kernel panic - Page 24 - Developer IT

Linux Kernel Devs: We Need New Blood

Linux Planet: "The Linux kernel development team is turning into a gaggle of geezers. Where is the next generation of Linux kernel developers?"

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Linux kernel 2.6.34 for Ubuntu Lucid

MyThoughts: "For all the people who are waiting for the Linux 2.6.34 kernel for Ubuntu the wait is over. The kernel is available for Ubuntu Lucid right now, the downside is that you have to compile it yourself, the upside there's an article for that."

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Kernel development statistics for 2.6.34 and beyond

LWN.net: "As of this writing, the current kernel prepatch is 2.6.34-rc6. A couple more prepatches are most likely due before the final release, but the number of changes to be found there should be small. In other words, 2.6.34 is close to its final form, so it makes sense to take a look at what has gone into this development cycle. In a few ways, 2.6.34 is an unusual kernel."

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Why is my Internet connection randomly dropping?

- by Jeanno

Ever since I have installed 12.04 (clean install not an upgrade), i have been having a drop in the Internet connection. The drop in the connection can be anything from 15 seconds to about 3 mins, and then the connection comes back. This behaviour happens while I am actively browsing the Internet, or if I wake up the computer and open Firefox (sometimes I have connection and sometimes I don't) . Please note that when the internet connection is on, it is not slow (as speedtest.net results show) In the beginning, I thought it was a problem with the driver r8169 for my RTL8111/8168B Ethernet card, so I downloaded the r8168 from Realtek website, followed the detailed instructions (blacklisted r8169, changed the file to '.bsh' ...), but still the same problem persisted. So I switched to a wireless connection, and I got the same problem with internet connection dropping randomly. Any ideas? Thanks in advance Output from 'lspci -v' Code: 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) Subsystem: Dell Device 04a7 Flags: bus master, fast devsel, latency 0 Capabilities: [e0] Vendor Specific Information: Len=0c <?> 00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 I/O behind bridge: 0000e000-0000efff Memory behind bridge: f8000000-fa0fffff Prefetchable memory behind bridge: 00000000d0000000-00000000dbffffff Capabilities: [88] Subsystem: Dell Device 04a7 Capabilities: [80] Power Management version 3 Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [a0] Express Root Port (Slot+), MSI 00 Capabilities: [100] Virtual Channel Capabilities: [140] Root Complex Link Kernel driver in use: pcieport Kernel modules: shpchp 00:01.1 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: 0000d000-0000dfff Memory behind bridge: f4000000-f60fffff Prefetchable memory behind bridge: 00000000c0000000-00000000cbffffff Capabilities: [88] Subsystem: Dell Device 04a7 Capabilities: [80] Power Management version 3 Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [a0] Express Root Port (Slot+), MSI 00 Capabilities: [100] Virtual Channel Capabilities: [140] Root Complex Link Kernel driver in use: pcieport Kernel modules: shpchp 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) Subsystem: Dell Device 04a7 Flags: bus master, fast devsel, latency 0, IRQ 52 Memory at f6108000 (64-bit, non-prefetchable) [size=16] Capabilities: [50] Power Management version 3 Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+ Kernel driver in use: mei Kernel modules: mei 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) (prog-if 20 [EHCI]) Subsystem: Dell Device 04a7 Flags: bus master, medium devsel, latency 0, IRQ 16 Memory at f6107000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) Subsystem: Dell Device 04a7 Flags: bus master, fast devsel, latency 0, IRQ 53 Memory at f6100000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [130] Root Complex Link Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 Memory behind bridge: fa400000-fa4fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Dell Device 04a7 Capabilities: [a0] Power Management version 2 Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=04, subordinate=04, sec-latency=0 I/O behind bridge: 0000c000-0000cfff Prefetchable memory behind bridge: 00000000dc100000-00000000dc1fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Dell Device 04a7 Capabilities: [a0] Power Management version 2 Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=05, subordinate=05, sec-latency=0 I/O behind bridge: 0000b000-0000bfff Memory behind bridge: fa300000-fa3fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Dell Device 04a7 Capabilities: [a0] Power Management version 2 Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=06, subordinate=06, sec-latency=0 I/O behind bridge: 0000a000-0000afff Memory behind bridge: fa200000-fa2fffff Capabilities: [40] Express Root Port (Slot+), MSI 00 Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit- Capabilities: [90] Subsystem: Dell Device 04a7 Capabilities: [a0] Power Management version 2 Kernel driver in use: pcieport Kernel modules: shpchp 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) (prog-if 20 [EHCI]) Subsystem: Dell Device 04a7 Flags: bus master, medium devsel, latency 0, IRQ 23 Memory at f6106000 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Capabilities: [58] Debug port: BAR=1 offset=00a0 Capabilities: [98] PCI Advanced Features Kernel driver in use: ehci_hcd 00:1f.0 ISA bridge: Intel Corporation P67 Express Chipset Family LPC Controller (rev 05) Subsystem: Dell Device 04a7 Flags: bus master, medium devsel, latency 0 Capabilities: [e0] Vendor Specific Information: Len=0c <?> Kernel modules: iTCO_wdt 00:1f.2 RAID bus controller: Intel Corporation 82801 SATA Controller [RAID mode] (rev 05) Subsystem: Dell Device 04a7 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 42 I/O ports at f070 [size=8] I/O ports at f060 [size=4] I/O ports at f050 [size=8] I/O ports at f040 [size=4] I/O ports at f020 [size=32] Memory at f6105000 (32-bit, non-prefetchable) [size=2K] Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [70] Power Management version 3 Capabilities: [a8] SATA HBA v1.0 Capabilities: [b0] PCI Advanced Features Kernel driver in use: ahci 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) Subsystem: Dell Device 04a7 Flags: medium devsel, IRQ 5 Memory at f6104000 (64-bit, non-prefetchable) [size=256] I/O ports at f000 [size=32] Kernel modules: i2c-i801 01:00.0 VGA compatible controller: NVIDIA Corporation Device 0dc5 (rev a1) (prog-if 00 [VGA controller]) Subsystem: NVIDIA Corporation Device 085b Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at f8000000 (32-bit, non-prefetchable) [size=16M] Memory at d0000000 (64-bit, prefetchable) [size=128M] Memory at d8000000 (64-bit, prefetchable) [size=32M] I/O ports at e000 [size=128] Expansion ROM at fa000000 [disabled] [size=512K] Capabilities: [60] Power Management version 3 Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [78] Express Endpoint, MSI 00 Capabilities: [b4] Vendor Specific Information: Len=14 <?> Capabilities: [100] Virtual Channel Capabilities: [128] Power Budgeting <?> Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?> Kernel driver in use: nouveau Kernel modules: nouveau, nvidiafb 01:00.1 Audio device: NVIDIA Corporation GF106 High Definition Audio Controller (rev a1) Subsystem: NVIDIA Corporation Device 085b Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at fa080000 (32-bit, non-prefetchable) [size=16K] Capabilities: [60] Power Management version 3 Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [78] Express Endpoint, MSI 00 Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel 02:00.0 VGA compatible controller: NVIDIA Corporation Device 0dc5 (rev a1) (prog-if 00 [VGA controller]) Subsystem: NVIDIA Corporation Device 085b Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at f4000000 (32-bit, non-prefetchable) [size=32M] Memory at c0000000 (64-bit, prefetchable) [size=128M] Memory at c8000000 (64-bit, prefetchable) [size=64M] I/O ports at d000 [size=128] Expansion ROM at f6000000 [disabled] [size=512K] Capabilities: [60] Power Management version 3 Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [78] Express Endpoint, MSI 00 Capabilities: [b4] Vendor Specific Information: Len=14 <?> Capabilities: [100] Virtual Channel Capabilities: [128] Power Budgeting <?> Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?> Kernel driver in use: nouveau Kernel modules: nouveau, nvidiafb 02:00.1 Audio device: NVIDIA Corporation GF106 High Definition Audio Controller (rev a1) Subsystem: NVIDIA Corporation Device 085b Flags: bus master, fast devsel, latency 0, IRQ 18 Memory at f6080000 (32-bit, non-prefetchable) [size=16K] Capabilities: [60] Power Management version 3 Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [78] Express Endpoint, MSI 00 Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel 03:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 03) (prog-if 30 [XHCI]) Subsystem: Dell Device 04a7 Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at fa400000 (64-bit, non-prefetchable) [size=8K] Capabilities: [50] Power Management version 3 Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+ Capabilities: [90] MSI-X: Enable+ Count=8 Masked- Capabilities: [a0] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [140] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff Capabilities: [150] Latency Tolerance Reporting Kernel driver in use: xhci_hcd 04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) Subsystem: Dell Device 04a7 Flags: bus master, fast devsel, latency 0, IRQ 51 I/O ports at c000 [size=256] Memory at dc104000 (64-bit, prefetchable) [size=4K] Memory at dc100000 (64-bit, prefetchable) [size=16K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 01 Capabilities: [b0] MSI-X: Enable- Count=4 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel Capabilities: [160] Device Serial Number 03-00-00-00-68-4c-e0-00 Kernel driver in use: r8168 Kernel modules: r8168 05:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series Firewire Controller (rev 01) (prog-if 10 [OHCI]) Subsystem: Dell Device 04a7 Flags: bus master, fast devsel, latency 0, IRQ 18 Memory at fa300000 (64-bit, non-prefetchable) [size=2K] I/O ports at b000 [size=256] Capabilities: [50] Power Management version 3 Capabilities: [80] MSI: Enable- Count=1/1 Maskable+ 64bit+ Capabilities: [98] Express Endpoint, MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [130] Device Serial Number 00-10-dc-ff-ff-cf-56-1a Kernel driver in use: firewire_ohci Kernel modules: firewire-ohci 06:00.0 SATA controller: JMicron Technology Corp. JMB362 SATA Controller (rev 10) (prog-if 01 [AHCI 1.0]) Subsystem: Dell Device 04a7 Flags: bus master, fast devsel, latency 0, IRQ 19 I/O ports at a040 [size=8] I/O ports at a030 [size=4] I/O ports at a020 [size=8] I/O ports at a010 [size=4] I/O ports at a000 [size=16] Memory at fa210000 (32-bit, non-prefetchable) [size=512] Capabilities: [8c] Power Management version 3 Capabilities: [50] Express Legacy Endpoint, MSI 00 Kernel driver in use: ahci Note that my wireless card is not showing, I have the Ralink 3390 card (which apparently does not show up on Ubuntu for some reason), however I am able to connect to wireless network and connect to the internet (when it is working)

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Why Wifi no longer works 12.04.1

- by Roger

starting this morning over wifi (Realtek RTL8188CE) on CLEVO W253HU. May be due to the update before yesterday, more pilot managed, but somehow it worked yesterday. If someone has an idea of the problem. Back command lines: cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=12.04 DISTRIB_CODENAME=precise DISTRIB_DESCRIPTION="Ubuntu 12.04.1 LTS" lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 006: ID 192f:0416 Avago Technologies, Pte. Bus 002 Device 004: ID 5986:0315 Acer, Inc lspci 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5) 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05) 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01) 03:00.0 Ethernet controller: JMicron Technology Corp. JMC250 PCI Express Gigabit Ethernet Controller (rev 05) 03:00.1 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev 90) 03:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller (rev 90) 03:00.3 System peripheral: JMicron Technology Corp. MS Host Controller (rev 90) lspci -nn | grep -i net 02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01) 03:00.0 Ethernet controller [0200]: JMicron Technology Corp. JMC250 PCI Express Gigabit Ethernet Controller [197b:0250] (rev 05) lspci -k 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: agpgart-intel 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: i915 Kernel modules: i915 00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: mei Kernel modules: mei 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: ehci_hcd 00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel 00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.2 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 3 (rev b5) Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5) Kernel driver in use: pcieport Kernel modules: shpchp 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: ehci_hcd 00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel modules: iTCO_wdt 00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: ahci 00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel modules: i2c-i801 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter (rev 01) Subsystem: Realtek Semiconductor Co., Ltd. Device 9196 Kernel modules: rtl8192ce 03:00.0 Ethernet controller: JMicron Technology Corp. JMC250 PCI Express Gigabit Ethernet Controller (rev 05) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: jme Kernel modules: jme 03:00.1 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev 90) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: sdhci-pci Kernel modules: sdhci-pci 03:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller (rev 90) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel modules: sdhci-pci 03:00.3 System peripheral: JMicron Technology Corp. MS Host Controller (rev 90) Subsystem: CLEVO/KAPOK Computer Device 4140 Kernel driver in use: jmb38x_ms Kernel modules: jmb38x_ms sudo lshw -C network *-network NON-RÉCLAMÉ description: Network controller produit: RTL8188CE 802.11b/g/n WiFi Adapter fabriquant: Realtek Semiconductor Co., Ltd. identifiant matériel: 0 information bus: pci@0000:02:00.0 version: 01 bits: 64 bits horloge: 33MHz fonctionnalités: pm msi pciexpress cap_list configuration: latency=0 ressources: portE/S:e000(taille=256) mémoire:f7d00000-f7d03fff *-network description: Ethernet interface produit: JMC250 PCI Express Gigabit Ethernet Controller fabriquant: JMicron Technology Corp. identifiant matériel: 0 information bus: pci@0000:03:00.0 nom logique: eth0 version: 05 numéro de série: 00:90:f5:c1:c6:45 taille: 100Mbit/s capacité: 1Gbit/s bits: 32 bits horloge: 33MHz fonctionnalités: pm pciexpress msix msi bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=jme driverversion=1.0.8 duplex=full ip=192.168.1.54 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s ressources: irq:44 mémoire:f7c20000-f7c23fff portE/S:d100(taille=128) portE/S:d000(taille=256) mémoire:f7c10000-f7c1ffff mémoire:f7c00000-f7c0ffff lsmod Module Size Used by btusb 18288 0 rfcomm 47604 0 bnep 18281 2 bluetooth 180104 11 btusb,rfcomm,bnep parport_pc 32866 0 ppdev 17113 0 binfmt_misc 17540 1 snd_hda_codec_realtek 224173 0 dm_crypt 23125 0 snd_hda_codec_hdmi 32474 0 uvcvideo 72627 0 videodev 98259 1 uvcvideo v4l2_compat_ioctl32 17128 1 videodev snd_hda_intel 33773 2 snd_hda_codec 127706 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel snd_hwdep 13668 1 snd_hda_codec snd_pcm 97188 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec snd_seq_midi 13324 0 snd_rawmidi 30748 1 snd_seq_midi jmb38x_ms 17646 0 psmouse 87692 0 serio_raw 13211 0 memstick 16569 1 jmb38x_ms snd_seq_midi_event 14899 1 snd_seq_midi rtl8192ce 84826 0 rtl8192c_common 75767 1 rtl8192ce rtlwifi 111202 1 rtl8192ce snd_seq 61896 2 snd_seq_midi,snd_seq_midi_event snd_timer 29990 2 snd_pcm,snd_seq snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq mac80211 506816 3 rtl8192ce,rtl8192c_common,rtlwifi mac_hid 13253 0 snd 78855 14 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device cfg80211 205544 2 rtlwifi,mac80211 soundcore 15091 1 snd snd_page_alloc 18529 2 snd_hda_intel,snd_pcm mei 41616 0 lp 17799 0 parport 46562 3 parport_pc,ppdev,lp usbhid 47199 0 hid 99559 1 usbhid i915 473035 3 drm_kms_helper 46978 1 i915 drm 242038 4 i915,drm_kms_helper jme 41259 0 i2c_algo_bit 13423 1 i915 sdhci_pci 18826 0 sdhci 33205 1 sdhci_pci wmi 19256 0 video 19596 1 i915 iwconfig lo no wireless extensions. eth0 no wireless extensions. ifconfig eth0 Link encap:Ethernet HWaddr 00:90:f5:c1:c6:45 inet adr:192.168.1.54 Bcast:192.168.1.255 Masque:255.255.255.0 adr inet6: fe80::290:f5ff:fec1:c645/64 Scope:Lien UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Packets reçus:4513 erreurs:0 :0 overruns:0 frame:0 TX packets:4359 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:1000 Octets reçus:3471675 (3.4 MB) Octets transmis:712722 (712.7 KB) Interruption:44 lo Link encap:Boucle locale inet adr:127.0.0.1 Masque:255.0.0.0 adr inet6: ::1/128 Scope:Hôte UP LOOPBACK RUNNING MTU:16436 Metric:1 Packets reçus:686 erreurs:0 :0 overruns:0 frame:0 TX packets:686 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:0 Octets reçus:64556 (64.5 KB) Octets transmis:64556 (64.5 KB) sudo iwlist scan lo Interface doesn't support scanning. eth0 Interface doesn't support scanning. uname -r -m 3.2.0-30-generic x86_64 cat /etc/network/interfaces auto lo iface lo inet loopback nm-tool NetworkManager Tool State: connected (global) - Device: eth0 [Connexion filaire 1] ------------------------------------------ Type: Wired Driver: jme State: connected Default: yes HW Address: 00:90:F5:C1:C6:45 Capabilities: Carrier Detect: yes Speed: 100 Mb/s Wired Properties Carrier: on IPv4 Settings: Address: 192.168.1.54 Prefix: 24 (255.255.255.0) Gateway: 192.168.1.1 DNS: 192.168.1.1 sudo rfkill listrfkill list 1: hci0: Bluetooth Soft blocked: no Hard blocked: no The absence of line "Kernel driver in use:" the return of lspci-k made ??me think that it is not loaded yet but he seems to be. lsmod | grep rtl8192ce rtl8192ce 137478 0 rtlwifi 118749 1 rtl8192ce mac80211 506816 2 rtl8192ce,rtlwifi I found something disturbing in / var / log / syslog Sep 14 11:40:11 pcroger kernel: [ 64.048783] rtl8192ce-0:rtl92c_init_sw_vars():<0-0> Failed to request firmware! Sep 14 11:40:11 pcroger kernel: [ 64.048795] rtlwifi-0:rtl_pci_probe():<0-0> Can't init_sw_vars. Sep 14 11:40:11 pcroger kernel: [ 64.048835] rtl8192ce 0000:02:00.0: PCI INT A disabled Sep 14 11:40:11 pcroger kernel: [ 64.943345] ata1.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x6 frozen Sep 14 11:40:11 pcroger kernel: [ 64.943358] ata1.00: failed command: READ FPDMA QUEUED Sep 14 11:40:11 pcroger kernel: [ 64.943371] ata1.00: cmd 60/00:00:00:68:6a/04:00:0b:00:00/40 tag 0 ncq 524288 in Sep 14 11:40:11 pcroger kernel: [ 64.943374] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) Sep 14 11:40:11 pcroger kernel: [ 64.943381] ata1.00: status: { DRDY } Ubuntu and takes forever to start (2 min).

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How to know when the kernel was last compiled? [closed]

- by Mehmet Tuncal

I have installed a linux distro and I "think" it is vulnerable to kernel exploits. I have to update kernel but I need to know if it is really compiled in year 2003? How can I know if additional updates are made to the kernel? Linux gandalf 2.4.21-4.ELsmp #1 SMP Fri Oct 3 17:52:56 EDT 2003 i686 i686 i386 GNU/Linux Does also "smp" mean that it is safe from latest threats or something? Thank you.

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Mouse takes a while to start working after boot

- by warkior

I just recently installed Ubuntu 12.04 (64 bit) and a number of my USB devices have stopped working. At least, they don't work for the first 3-5 minutes. I have two mice (one wireless, one wired) and a camera, which seem to take Ubuntu 3-5 minutes to recognize after booting up. Eventually, they do start to work, but it takes ages! lsusb results: (when the mice are working...) $ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 002: ID 046d:c512 Logitech, Inc. LX-700 Cordless Desktop Receiver Bus 003 Device 003: ID 03f0:3f11 Hewlett-Packard PSC-1315/PSC-1317 Bus 006 Device 002: ID 046d:c00c Logitech, Inc. Optical Wheel Mouse Bus 006 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver syslog entries for what seems (to my very untrained eye) to be the problem: Oct 12 20:12:51 REMOVED-GA-MA785GM-US2H kernel: [ 17.420117] usb 2-3: device descriptor read/64, error -110 Oct 12 20:12:57 REMOVED-GA-MA785GM-US2H goa[1879]: goa-daemon version 3.4.0 starting [main.c:112, main()] Oct 12 20:13:06 REMOVED-GA-MA785GM-US2H kernel: [ 32.636107] usb 2-3: device descriptor read/64, error -110 Oct 12 20:13:06 REMOVED-GA-MA785GM-US2H kernel: [ 32.852122] usb 2-3: new high-speed USB device number 3 using ehci_hcd Oct 12 20:13:21 REMOVED-GA-MA785GM-US2H kernel: [ 47.964131] usb 2-3: device descriptor read/64, error -110 Oct 12 20:13:37 REMOVED-GA-MA785GM-US2H kernel: [ 63.180115] usb 2-3: device descriptor read/64, error -110 Oct 12 20:13:37 REMOVED-GA-MA785GM-US2H kernel: [ 63.396126] usb 2-3: new high-speed USB device number 4 using ehci_hcd Oct 12 20:13:47 REMOVED-GA-MA785GM-US2H kernel: [ 73.804158] usb 2-3: device not accepting address 4, error -110 Oct 12 20:13:47 REMOVED-GA-MA785GM-US2H kernel: [ 73.916190] usb 2-3: new high-speed USB device number 5 using ehci_hcd Oct 12 20:13:58 REMOVED-GA-MA785GM-US2H kernel: [ 84.324160] usb 2-3: device not accepting address 5, error -110 Oct 12 20:13:58 REMOVED-GA-MA785GM-US2H kernel: [ 84.324197] hub 2-0:1.0: unable to enumerate USB device on port 3 Oct 12 20:13:58 REMOVED-GA-MA785GM-US2H udev-configure-printer: failed to claim interface Oct 12 20:13:58 REMOVED-GA-MA785GM-US2H udev-configure-printer: Failed to get parent Oct 12 20:13:58 REMOVED-GA-MA785GM-US2H udev-configure-printer: device devpath is /devices/pci0000:00/0000:00:12.0/usb3/3-3 Oct 12 20:13:58 REMOVED-GA-MA785GM-US2H udev-configure-printer: MFG:hp MDL:psc 1310 series SERN:CN47CB60BJO2 serial:CN47CB60BJO2 Oct 12 20:13:58 REMOVED-GA-MA785GM-US2H kernel: [ 84.768132] usb 5-3: new full-speed USB device number 2 using ohci_hcd Oct 12 20:14:01 REMOVED-GA-MA785GM-US2H udev-configure-printer: no corresponding CUPS device found Oct 12 20:14:13 REMOVED-GA-MA785GM-US2H kernel: [ 99.904185] usb 5-3: device descriptor read/64, error -110 Oct 12 20:14:29 REMOVED-GA-MA785GM-US2H kernel: [ 115.144188] usb 5-3: device descriptor read/64, error -110 Oct 12 20:14:29 REMOVED-GA-MA785GM-US2H kernel: [ 115.384178] usb 5-3: new full-speed USB device number 3 using ohci_hcd Oct 12 20:14:44 REMOVED-GA-MA785GM-US2H kernel: [ 130.520196] usb 5-3: device descriptor read/64, error -110 Oct 12 20:14:59 REMOVED-GA-MA785GM-US2H kernel: [ 145.760179] usb 5-3: device descriptor read/64, error -110 Oct 12 20:14:59 REMOVED-GA-MA785GM-US2H kernel: [ 146.000173] usb 5-3: new full-speed USB device number 4 using ohci_hcd Oct 12 20:15:10 REMOVED-GA-MA785GM-US2H kernel: [ 156.408168] usb 5-3: device not accepting address 4, error -110 Oct 12 20:15:10 REMOVED-GA-MA785GM-US2H kernel: [ 156.544188] usb 5-3: new full-speed USB device number 5 using ohci_hcd Oct 12 20:15:20 REMOVED-GA-MA785GM-US2H kernel: [ 166.952181] usb 5-3: device not accepting address 5, error -110 Oct 12 20:15:20 REMOVED-GA-MA785GM-US2H kernel: [ 166.952215] hub 5-0:1.0: unable to enumerate USB device on port 3 Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H kernel: [ 167.216164] usb 6-2: new low-speed USB device number 2 using ohci_hcd Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H mtp-probe: checking bus 6, device 2: "/sys/devices/pci0000:00/0000:00:13.1/usb6/6-2" Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H mtp-probe: bus: 6, device: 2 was not an MTP device Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H kernel: [ 167.396138] input: Logitech USB Mouse as /devices/pci0000:00/0000:00:13.1/usb6/6-2/6-2:1.0/input/input16 Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H kernel: [ 167.396442] generic-usb 0003:046D:C00C.0003: input,hidraw2: USB HID v1.10 Mouse [Logitech USB Mouse] on usb-0000:00:13.1-2/input0 Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H kernel: [ 167.660187] usb 6-3: new full-speed USB device number 3 using ohci_hcd Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H mtp-probe: checking bus 6, device 3: "/sys/devices/pci0000:00/0000:00:13.1/usb6/6-3" Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H mtp-probe: bus: 6, device: 3 was not an MTP device Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H kernel: [ 167.859045] logitech-djreceiver 0003:046D:C52B.0006: hiddev0,hidraw3: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:13.1-3/input2 Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H kernel: [ 167.865086] input: Logitech Unifying Device. Wireless PID:400a as /devices/pci0000:00/0000:00:13.1/usb6/6-3/6-3:1.2/0003:046D:C52B.0006/input/input17 Oct 12 20:15:21 REMOVED-GA-MA785GM-US2H kernel: [ 167.865291] logitech-djdevice 0003:046D:C52B.0007: input,hidraw4: USB HID v1.11 Mouse [Logitech Unifying Device. Wireless PID:400a] on usb-0000:00:13.1-3:1 Oct 12 20:15:24 REMOVED-GA-MA785GM-US2H colord: io/hpmud/musb.c 139: unable get_string_descriptor -1: Operation not permitted Oct 12 20:15:24 REMOVED-GA-MA785GM-US2H colord: io/hpmud/musb.c 2040: invalid product id string ret=-1 Oct 12 20:15:24 REMOVED-GA-MA785GM-US2H colord: io/hpmud/musb.c 139: unable get_string_descriptor -1: Operation not permitted Oct 12 20:15:24 REMOVED-GA-MA785GM-US2H colord: io/hpmud/musb.c 2045: invalid serial id string ret=-1 Oct 12 20:15:24 REMOVED-GA-MA785GM-US2H colord: io/hpmud/musb.c 139: unable get_string_descriptor -1: Operation not permitted Oct 12 20:15:24 REMOVED-GA-MA785GM-US2H colord: io/hpmud/musb.c 2050: invalid manufacturer string ret=-1

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Server hung with "blocked for more than 120 seconds", diskless

- by alterpub

I have server which hung every 2-5 days. dmesg show following situation: kernel: [490894.231753] INFO: task munin-html:10187 blocked for more than 120 seconds. kernel: [490894.231799] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kernel: [490894.231843] munin-html D 0000000000000000 0 10187 9796 0x00000000 kernel: [490894.231878] ffff88063174b968 0000000000000082 ffff88063174b8d8 0000000000015b80 kernel: [490894.231930] ffff88063174bfd8 0000000000015b80 ffff88063174bfd8 ffff88062fe644d0 kernel: [490894.231982] 0000000000015b80 0000000000015b80 ffff88063174bfd8 0000000000015b80 kernel: [490894.232033] Call Trace: kernel: [490894.232059] [<ffffffff8117fce0>] ? sync_buffer+0x0/0x50 kernel: [490894.232089] [<ffffffff815a1f13>] io_schedule+0x73/0xc0 kernel: [490894.232115] [<ffffffff8117fd25>] sync_buffer+0x45/0x50 kernel: [490894.232143] [<ffffffff815a258f>] __wait_on_bit+0x5f/0x90 kernel: [490894.232170] [<ffffffff8117fce0>] ? sync_buffer+0x0/0x50 kernel: [490894.232197] [<ffffffff815a2638>] out_of_line_wait_on_bit+0x78/0x90 kernel: [490894.232227] [<ffffffff81080250>] ? wake_bit_function+0x0/0x40 kernel: [490894.232255] [<ffffffff8117fcd6>] __wait_on_buffer+0x26/0x30 kernel: [490894.232288] [<ffffffffa00131be>] squashfs_read_data+0x1be/0x520 [squashfs] kernel: [490894.232320] [<ffffffff8114f0f1>] ? __mem_cgroup_try_charge+0x71/0x450 kernel: [490894.232350] [<ffffffffa0013963>] squashfs_cache_get+0x1c3/0x320 [squashfs] kernel: [490894.232381] [<ffffffffa00136eb>] ? squashfs_copy_data+0x10b/0x130 [squashfs] kernel: [490894.232426] [<ffffffff815a3dbe>] ? _raw_spin_lock+0xe/0x20 kernel: [490894.232454] [<ffffffffa0013b68>] ? squashfs_read_metadata+0x48/0xf0 [squashfs] kernel: [490894.232499] [<ffffffffa0013ae1>] squashfs_get_datablock+0x21/0x30 [squashfs] kernel: [490894.232544] [<ffffffffa0015026>] squashfs_readpage+0x436/0x4a0 [squashfs] kernel: [490894.232575] [<ffffffff8111a375>] ? __inc_zone_page_state+0x35/0x40 kernel: [490894.232606] [<ffffffff8110d072>] __do_page_cache_readahead+0x172/0x210 kernel: [490894.232636] [<ffffffff8110d131>] ra_submit+0x21/0x30 kernel: [490894.232662] [<ffffffff811045f3>] filemap_fault+0x3f3/0x450 kernel: [490894.232691] [<ffffffff812bd156>] ? prio_tree_insert+0x256/0x2b0 kernel: [490894.232726] [<ffffffffa009225d>] aufs_fault+0x11d/0x170 [aufs] kernel: [490894.232755] [<ffffffff8111f6d4>] __do_fault+0x54/0x560 kernel: [490894.232782] [<ffffffff81122f39>] handle_mm_fault+0x1b9/0x440 kernel: [490894.232811] [<ffffffff811286f5>] ? do_mmap_pgoff+0x335/0x380 kernel: [490894.232840] [<ffffffff815a7af5>] do_page_fault+0x125/0x350 kernel: [490894.232867] [<ffffffff815a4675>] page_fault+0x25/0x30 Os info cat /etc/issue.net Ubuntu 10.04.2 LTS uname -a Linux Shard1Host3 2.6.35-32-server #68~lucid1-Ubuntu SMP Wed Mar 28 18:33:00 UTC 2012 x86_64 GNU/Linux This system load via ltsp and hasn't harddrives also it has a lot of memory 24Gb. free -m total used free shared buffers cached Mem: 24152 17090 7061 0 50 494 -/+ buffers/cache: 16545 7607 Swap: 0 0 0 I put vmstat info here but I think it won't give results after reboot vmstat 1 30 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 7231156 52196 506400 0 0 0 0 172 143 7 0 92 0 1 0 0 7231024 52196 506400 0 0 0 0 7859 16233 5 0 94 0 0 0 0 7231024 52196 506400 0 0 0 0 7870 16446 2 0 98 0 0 0 0 7230900 52196 506400 0 0 0 0 7308 15661 5 0 95 0 0 0 0 7231100 52196 506400 0 0 0 0 7960 16543 6 0 94 0 0 0 0 7231100 52196 506400 0 0 0 0 7542 16047 5 1 94 0 3 0 0 7231100 52196 506400 0 0 0 0 7709 16621 3 0 96 0 0 0 0 7231220 52196 506400 0 0 0 0 7857 16552 4 0 96 0 0 0 0 7231220 52196 506400 0 0 0 0 7192 15491 6 0 94 0 0 0 0 7231220 52196 506400 0 0 0 0 7423 15792 5 1 94 0 1 0 0 7231260 52196 506404 0 0 0 0 7686 16296 2 0 98 0 0 0 0 7231260 52196 506404 0 0 0 0 6976 15183 5 0 95 0 0 0 0 7231260 52196 506404 0 0 0 0 7303 15600 4 0 95 0 0 0 0 7231320 52196 506404 0 0 0 0 7967 16241 1 0 98 0 0 0 0 7231444 52196 506404 0 0 0 0 6948 15113 6 0 94 0 0 0 0 7231444 52196 506404 0 0 0 0 7931 16181 6 0 94 0 1 0 0 7231516 52196 506404 0 0 0 0 7715 15829 6 0 94 0 0 0 0 7231516 52196 506404 0 0 0 0 7771 16036 2 0 97 0 0 0 0 7231268 52196 506404 0 0 0 0 7782 16202 6 0 94 0 1 0 0 7231212 52196 506404 0 0 0 0 7457 15622 4 0 96 0 0 0 0 7231212 52196 506404 0 0 0 0 7573 16045 2 0 98 0 2 0 0 7231216 52196 506404 0 0 0 0 7689 16076 6 0 94 0 0 0 0 7231424 52196 506404 0 0 0 0 7429 15650 4 0 95 0 3 0 0 7231424 52196 506404 0 0 0 0 7534 16168 3 0 97 0 1 0 0 7230548 52196 506404 0 0 0 0 8559 15926 7 1 92 0 0 0 0 7230672 52196 506404 0 0 0 0 7720 15905 2 0 98 0 0 0 0 7230548 52196 506404 0 0 0 0 7677 16313 5 0 95 0 1 0 0 7230676 52196 506404 0 0 0 0 7209 15432 5 0 95 0 0 0 0 7230800 52196 506404 0 0 0 0 7522 15861 2 0 98 0 0 0 0 7230552 52196 506404 0 0 0 0 7760 16661 5 0 95 0 In the munin(monitoring system) graphs I see(before server hung): Disk(nbd0) IOs per device: read: 289m but avg by week 2.09m Disk(nbd0) throughput per device: read: 4.73k but avg by week 108.76 Disk(nbd0) utilization per device: 100% but avg by week 1.2% Eth0 traffic was low: in/out only 2Mbps Number of threads increased to 566 usually 392 Fork rate 1.08 but usually 2.82 VMStat(processes state) Increased to 17.77(from 0 as far as I could see in the graph) CPU usage iowait 880.46% when usually 6.67% It'll be great if somebody help me to understand what's up.

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What are the first operations that the Linux Kernel executes on boot?

- by The Rook

After the boot loader hands execution over to the kernel, what happens? I know assembler, so what are the first few executions that a kernel must make or is there a C function that does this? What is the startup sequence before the kernel can execute an arbitrary binary?

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How to restore a hidden loadable kernel module from /sys/module and dealing with restoring holders_dir?

- by user1833005

I'm playing with kernel module hiding on Linux Kernel 3.x. I try to hide and recover the module from /sys/module. Everything works fine on Kernel Version 3.0 and 3.2.6, I can load and unload the module and hide and unhide it. When I'm unloading the module on kernel 3.6.6 I get the following error: rmmod: ERROR: could not open '/sys/module/xxx/holders': No such file or directory rmmod: ERROR: Module xxx is in use Has anybody an idea how I could restore of the module so that I am able to unload it without errors? Here is my code: /* hide from /sys/module */ kobject_del(&__this_module.mkobj.kobj); list_del(&__this_module.mkobj.kobj.entry); /* add to /sys/module */ kobject_add(&__this_module.mkobj.kobj,__this_module.mkobj.kobj.parent,"xxx"); Thank you four help :)

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Windows XP: Have my program run in kernel mode?

- by Kalamari

I'm currently learning about the different modes the Windows operating system runs in (kernel mode vs. user mode), device drivers, their respective advantages and disadvantages and computer security in general. I would like to create a practical example of what a faulty device driver that runs in kernel mode can do to the system, by for example corrupting memory used for critical OS-processes. How can I execute my code in kernel mode instead of user mode, directly? Do I have to write a dummy device driver and install it to do this? Where can I read more about kernel and user mode in Windows? I know the dangers of this and will do all of the experiments on a virtual machine running Windows XP only

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Forensic Analysis of the OOM-Killer

- by Oddthinking

Ubuntu's Out-Of-Memory Killer wreaked havoc on my server, quietly assassinating my applications, sendmail, apache and others. I've managed to learn what the OOM Killer is, and about its "badness" rules. While my machine is small, my applications are even smaller, and typically only half of my physical memory is in use, let alone swap-space, so I was surprised. I am trying to work out the culprit, but I don't know how to read the OOM-Killer logs. Can anyone please point me to a tutorial on how to read the data in the logs (what are ve, free and gen?), or help me parse these logs? Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 1, exc 2326 0 goal 2326 0... Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): task ebb0c6f0, thg d33a1b00, sig 1 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 1, exc 2326 0 red 61795 745 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 2, exc 122 0 goal 383 0... Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): task ebb0c6f0, thg d33a1b00, sig 1 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 2, exc 383 0 red 61795 745 Apr 20 20:03:27 EL135 kernel: kill_signal(13516.0): task ebb0c6f0, thg d33a1b00, sig 2 Apr 20 20:03:27 EL135 kernel: OOM killed process watchdog (pid=14490, ve=13516) exited, free=43104 gen=24501. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=4457, ve=13516) exited, free=43104 gen=24502. Apr 20 20:03:27 EL135 kernel: OOM killed process ntpd (pid=10816, ve=13516) exited, free=43104 gen=24503. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=27401, ve=13516) exited, free=43104 gen=24504. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=29009, ve=13516) exited, free=43104 gen=24505. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=10557, ve=13516) exited, free=49552 gen=24506. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=24983, ve=13516) exited, free=53117 gen=24507. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=29129, ve=13516) exited, free=68493 gen=24508. Apr 20 20:03:27 EL135 kernel: OOM killed process sendmail-mta (pid=941, ve=13516) exited, free=68803 gen=24509. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=12418, ve=13516) exited, free=69330 gen=24510. Apr 20 20:03:27 EL135 kernel: OOM killed process python (pid=22953, ve=13516) exited, free=72275 gen=24511. Apr 20 20:03:27 EL135 kernel: OOM killed process apache2 (pid=6624, ve=13516) exited, free=76398 gen=24512. Apr 20 20:03:27 EL135 kernel: OOM killed process python (pid=23317, ve=13516) exited, free=94285 gen=24513. Apr 20 20:03:27 EL135 kernel: OOM killed process tail (pid=29030, ve=13516) exited, free=95339 gen=24514. Apr 20 20:03:28 EL135 kernel: OOM killed process apache2 (pid=20583, ve=13516) exited, free=101663 gen=24515. Apr 20 20:03:28 EL135 kernel: OOM killed process logger (pid=12894, ve=13516) exited, free=101694 gen=24516. Apr 20 20:03:28 EL135 kernel: OOM killed process bash (pid=21119, ve=13516) exited, free=101849 gen=24517. Apr 20 20:03:28 EL135 kernel: OOM killed process atd (pid=991, ve=13516) exited, free=101880 gen=24518. Apr 20 20:03:28 EL135 kernel: OOM killed process apache2 (pid=14649, ve=13516) exited, free=102748 gen=24519. Apr 20 20:03:28 EL135 kernel: OOM killed process grep (pid=21375, ve=13516) exited, free=132167 gen=24520. Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 4, exc 4215 0 goal 4826 0... Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): task ede29370, thg df98b880, sig 1 Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 4, exc 4826 0 red 189481 331 Apr 20 20:03:57 EL135 kernel: kill_signal(13516.0): task ede29370, thg df98b880, sig 2 Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 5, exc 3564 0 goal 3564 0... Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): task c6c90110, thg cdb1a100, sig 1 Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 5, exc 3564 0 red 189481 331 Apr 20 20:04:53 EL135 kernel: kill_signal(13516.0): task c6c90110, thg cdb1a100, sig 2 Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): selecting to kill, queued 0, seq 6, exc 8071 0 goal 8071 0... Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): task d7294050, thg c03f42c0, sig 1 Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): selected 1, signalled 1, queued 1, seq 6, exc 8071 0 red 189481 331 Apr 20 20:07:14 EL135 kernel: kill_signal(13516.0): task d7294050, thg c03f42c0, sig 2 Watchdog is a watchdog task, that was idle; nothing in the logs to suggest it had done anything for days. Its job is to restart one of the applications if it dies, so a bit ironic that it is the first to get killed. Tail was monitoring a few logs files. Unlikely to be consuming memory madly. The apache web-server only serves pages to a little old lady who only uses it to get to church on Sundays a couple of developers who were in bed asleep, and hadn't visited a page on the site for a few weeks. The only traffic it might have had is from the port-scanners; all the content is password-protected and not linked from anywhere, so no spiders are interested. Python is running two separate custom applications. Nothing in the logs to suggest they weren't humming along as normal. One of them was a relatively recent implementation, which makes suspect #1. It doesn't have any data-structures of any significance, and normally uses only about 8% of the total physical RAW. It hasn't misbehaved since. The grep is suspect #2, and the one I want to be guilty, because it was a once-off command. The command (which piped the output of a grep -r to another grep) had been started at least 30 minutes earlier, and the fact it was still running is suspicious. However, I wouldn't have thought grep would ever use a significant amount of memory. It took a while for the OOM killer to get to it, which suggests it wasn't going mad, but the OOM killer stopped once it was killed, suggesting it may have been a memory-hog that finally satisfied the OOM killer's blood-lust.

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How do I (and do I even want to) delete outdated versions of the Linux kernel?

- by NoCatharsis

I notice that GRUB (or is it GRUB2?) asks which version of Linux I'd like to boot, and outdated versions of the kernel are listed. How do I remove these and their associated files to save disk space? Since I'm new to Linux, is there any reason why I shouldn't remove them?

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How to load kernel module at startup on FC9?

- by dicroce

I need to know how to automatically load a kernel module at startup on FC9. All the sites talk about adding an entry to /etc/modules.conf.... But that does not exist on FC9... Instead I have /etc/modprobe.d/ directory... Now, I suppose I need to put a file in this dir for my driver but I have no idea how to write this file... I just need "modprobe name" to be run...

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nvidia driver problems after upgrading to 3.2.0-26 on Ubuntu 12.04 64bit

- by Lev Levitsky

After installing latest updates I can't set screen resolution higher than 1024x768; every time after the boot I get a message Could not apply the stored configuration for the monitors (Note: removing ~/.config/monitors.xml stopped the message, but not the problem) I can boot with 3.2.0-25 and the graphics look normal. Here's what I have in /var/log/apt/term.log (excerpt): Setting up linux-image-3.2.0-26-generic (3.2.0-26.41) ... Running depmod. update-initramfs: deferring update (hook will be called later) Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/dkms 3.2.0-26-generic /boot/vmlinuz-3.2.0-26-generic Error! Problems with depmod detected. Automatically uninstalling this module. DKMS: Install Failed (depmod problems). Module rolled back to built state. run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.2.0-26-generic /boot/vmlinuz-3.2.0-26-generic update-initramfs: Generating /boot/initrd.img-3.2.0-26-generic run-parts: executing /etc/kernel/postinst.d/pm-utils 3.2.0-26-generic /boot/vmlinuz-3.2.0-26-generic run-parts: executing /etc/kernel/postinst.d/update-notifier 3.2.0-26-generic /boot/vmlinuz-3.2.0-26-generic run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.2.0-26-generic /boot/vmlinuz-3.2.0-26-generic Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.2.0-26-generic Found initrd image: /boot/initrd.img-3.2.0-26-generic Found linux image: /boot/vmlinuz-3.2.0-25-generic Found initrd image: /boot/initrd.img-3.2.0-25-generic Found linux image: /boot/vmlinuz-3.2.0-24-generic Found initrd image: /boot/initrd.img-3.2.0-24-generic Found linux image: /boot/vmlinuz-3.2.0-23-generic Found initrd image: /boot/initrd.img-3.2.0-23-generic Found linux image: /boot/vmlinuz-3.0.0-17-generic Found initrd image: /boot/initrd.img-3.0.0-17-generic Found memtest86+ image: /boot/memtest86+.bin I went to "additional drivers" and saw some updates available there, but an attempt to install them failed, leaving the following in /var/log/jockey.log (long log, pasted here). The full log won't fit in the question, so I'm showing $ fgrep 'ERROR' /var/log/jockey.log 2012-06-30 17:29:57,897 WARNING: modinfo for module vmxnet failed: ERROR: modinfo: could not find module vmxnet 2012-06-30 17:29:57,937 WARNING: modinfo for module wl failed: ERROR: modinfo: could not find module wl 2012-06-30 17:29:58,072 WARNING: modinfo for module nvidia_96 failed: ERROR: modinfo: could not find module nvidia_96 2012-06-30 17:29:58,240 WARNING: modinfo for module nvidia_current failed: ERROR: modinfo: could not find module nvidia_current 2012-06-30 17:29:58,293 WARNING: modinfo for module nvidia_current_updates failed: ERROR: modinfo: could not find module nvidia_current_updates 2012-06-30 17:29:58,351 WARNING: modinfo for module nvidia_173_updates failed: ERROR: modinfo: could not find module nvidia_173_updates 2012-06-30 17:29:58,385 WARNING: modinfo for module nvidia_173 failed: ERROR: modinfo: could not find module nvidia_173 2012-06-30 17:29:58,420 WARNING: modinfo for module nvidia_96_updates failed: ERROR: modinfo: could not find module nvidia_96_updates 2012-06-30 17:29:58,455 WARNING: modinfo for module ath_pci failed: ERROR: modinfo: could not find module ath_pci 2012-06-30 17:29:58,478 WARNING: modinfo for module fglrx_updates failed: ERROR: modinfo: could not find module fglrx_updates 2012-06-30 17:29:58,531 WARNING: modinfo for module fglrx failed: ERROR: modinfo: could not find module fglrx 2012-06-30 17:29:58,588 WARNING: modinfo for module omapdrm_pvr failed: ERROR: modinfo: could not find module omapdrm_pvr 2012-06-30 17:29:59,537 WARNING: modinfo for module nvidia_current failed: ERROR: modinfo: could not find module nvidia_current 2012-06-30 17:29:59,613 WARNING: modinfo for module nvidia_173_updates failed: ERROR: modinfo: could not find module nvidia_173_updates 2012-06-30 17:29:59,686 WARNING: modinfo for module nvidia_173 failed: ERROR: modinfo: could not find module nvidia_173 2012-06-30 17:29:59,764 WARNING: modinfo for module nvidia_current_updates failed: ERROR: modinfo: could not find module nvidia_current_updates 2012-06-30 17:30:29,544 WARNING: modinfo for module nvidia_current_updates failed: ERROR: modinfo: could not find module nvidia_current_updates 2012-06-30 17:30:29,545 ERROR: XorgDriverHandler.enable(): package or module not installed, aborting I'm not sure if it's a bug, as the first log shows some errors. What can I try?

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12.04lts: no network internet

- by dgermann

Friends-- Cannot connect reliably to ethernet nor at all to Internet: Symptoms: About 2 weeks ago did an upgrade. Have not been able to connect to ethernet nor Internet. Today, for example, boot up this System76 laptop and there was no network connection. Did sudo mount -a and got some internal network connectivity: doug@ubuntu:/sam$ ping earth PING earth (192.168.0.201) 56(84) bytes of data. 64 bytes from earth (192.168.0.201): icmp_req=1 ttl=64 time=0.160 ms 64 bytes from earth (192.168.0.201): icmp_req=2 ttl=64 time=0.177 ms 64 bytes from earth (192.168.0.201): icmp_req=3 ttl=64 time=0.159 ms ^C --- earth ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1998ms rtt min/avg/max/mdev = 0.159/0.165/0.177/0.013 ms doug@ubuntu:/sam$ ping doug2 PING doug (192.168.0.4) 56(84) bytes of data. ^C --- doug ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 1999ms doug@ubuntu:/sam$ ping sharon PING sharon (192.168.0.111) 56(84) bytes of data. 64 bytes from sharon (192.168.0.111): icmp_req=1 ttl=128 time=0.276 ms ^C --- sharon ping statistics --- 6 packets transmitted, 1 received, 83% packet loss, time 5031ms rtt min/avg/max/mdev = 0.276/0.276/0.276/0.000 ms doug@ubuntu:/sam$ ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. ^C --- 192.168.0.1 ping statistics --- 6 packets transmitted, 0 received, 100% packet loss, time 4999ms doug@ubuntu:/sam$ ping earth PING earth (192.168.0.201) 56(84) bytes of data. ^C --- earth ping statistics --- 5 packets transmitted, 0 received, 100% packet loss, time 4032ms doug@ubuntu:/sam$ ping yahoo.com ping: unknown host yahoo.com doug@ubuntu:/sam$ ping ubuntu.com ping: unknown host ubuntu.com doug@ubuntu:/sam$ ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. ^C --- 8.8.8.8 ping statistics --- 14 packets transmitted, 0 received, 100% packet loss, time 13103ms Note that earth is the cifs server, and one time pinging it worked, later failed. Clues: doug@ubuntu:/sam$ grep -i eth /var/log/syslog |tail Aug 23 15:32:46 ubuntu kernel: [ 5328.070401] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 Aug 23 15:32:48 ubuntu kernel: [ 5330.651139] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=19090 PROTO=2 Aug 23 15:34:51 ubuntu kernel: [ 5453.072279] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 Aug 23 15:34:55 ubuntu kernel: [ 5457.085433] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16137 PROTO=2 Aug 23 15:36:56 ubuntu kernel: [ 5578.074492] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 Aug 23 15:37:00 ubuntu kernel: [ 5582.359006] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16150 PROTO=2 Aug 23 15:39:01 ubuntu kernel: [ 5703.074410] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 Aug 23 15:39:03 ubuntu kernel: [ 5705.070122] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16163 PROTO=2 Aug 23 15:41:06 ubuntu kernel: [ 5828.074387] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 Aug 23 15:41:13 ubuntu kernel: [ 5835.319941] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=23298 PROTO=2 doug@ubuntu:/sam$ ifconfig -a eth0 Link encap:Ethernet HWaddr [BLANKED] inet addr:192.168.0.7 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::21b:fcff:fe29:9dfc/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3961 errors:0 dropped:0 overruns:0 frame:0 TX packets:2007 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:991204 (991.2 KB) TX bytes:252908 (252.9 KB) Interrupt:16 Base address:0xec00 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2190 errors:0 dropped:0 overruns:0 frame:0 TX packets:2190 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:168052 (168.0 KB) TX bytes:168052 (168.0 KB) wlan0 Link encap:Ethernet HWaddr 00:19:d2:72:5a:0c UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) doug@ubuntu:/sam$ iwconfig lo no wireless extensions. wlan0 IEEE 802.11abg ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off eth0 no wireless extensions. doug@ubuntu:/sam$ lsmod Module Size Used by des_generic 21191 0 md4 12523 0 nls_iso8859_1 12617 1 nls_cp437 12751 1 vfat 17308 1 fat 55605 1 vfat usb_storage 39646 1 dm_crypt 22528 1 joydev 17393 0 snd_hda_codec_analog 75395 1 snd_hda_intel 32719 2 pcmcia 39826 0 snd_hda_codec 109562 2 snd_hda_codec_analog,snd_hda_intel snd_hwdep 13276 1 snd_hda_codec ip6t_LOG 16846 4 xt_hl 12465 6 ip6t_rt 12473 3 snd_pcm 80916 2 snd_hda_intel,snd_hda_codec nf_conntrack_ipv6 13581 7 nf_defrag_ipv6 13175 1 nf_conntrack_ipv6 ipt_REJECT 12512 1 ipt_LOG 12783 5 xt_limit 12541 12 xt_tcpudp 12531 21 xt_addrtype 12596 4 snd_seq_midi 13132 0 xt_state 12514 14 ip6table_filter 12711 1 ip6_tables 22528 3 ip6t_LOG,ip6t_rt,ip6table_filter nf_conntrack_netbios_ns 12585 0 nf_conntrack_broadcast 12541 1 nf_conntrack_netbios_ns nf_nat_ftp 12595 0 nf_nat 24959 1 nf_nat_ftp nf_conntrack_ipv4 19084 9 nf_nat nf_defrag_ipv4 12649 1 nf_conntrack_ipv4 nf_conntrack_ftp 13183 1 nf_nat_ftp nf_conntrack 73847 8 nf_conntrack_ipv6,xt_state,nf_conntrack_netbios_ns,nf_conntrack_broadcast,nf_nat_ftp,nf_nat,nf_conntrack_ipv4,nf_conntrack_ftp iptable_filter 12706 1 ip_tables 18106 1 iptable_filter snd_rawmidi 25424 1 snd_seq_midi psmouse 86982 0 x_tables 22011 13 ip6t_LOG,xt_hl,ip6t_rt,ipt_REJECT,ipt_LOG,xt_limit,xt_tcpudp,xt_addrtype,xt_state,ip6table_filter,ip6_tables,iptable_filter,ip_tables arc4 12473 2 r592 17808 0 snd_seq_midi_event 14475 1 snd_seq_midi memstick 15857 1 r592 yenta_socket 27465 0 serio_raw 13027 0 pcmcia_rsrc 18367 1 yenta_socket iwl3945 73186 0 pcmcia_core 21511 3 pcmcia,yenta_socket,pcmcia_rsrc iwl_legacy 71334 1 iwl3945 snd_seq 51592 2 snd_seq_midi,snd_seq_midi_event mac80211 436493 2 iwl3945,iwl_legacy snd_timer 28931 2 snd_pcm,snd_seq snd_seq_device 14172 3 snd_seq_midi,snd_rawmidi,snd_seq rfcomm 38139 0 bnep 17830 2 parport_pc 32114 0 bluetooth 158447 10 rfcomm,bnep ppdev 12849 0 cfg80211 178877 3 iwl3945,iwl_legacy,mac80211 asus_laptop 23693 0 sparse_keymap 13658 1 asus_laptop input_polldev 13648 1 asus_laptop nls_utf8 12493 6 cifs 258037 10 snd 62218 13 snd_hda_codec_analog,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device soundcore 14635 1 snd mac_hid 13077 0 snd_page_alloc 14108 2 snd_hda_intel,snd_pcm lp 17455 0 parport 40930 3 parport_pc,ppdev,lp i915 428418 3 firewire_ohci 40172 0 sdhci_pci 18324 0 sdhci 28241 1 sdhci_pci firewire_core 56940 1 firewire_ohci crc_itu_t 12627 1 firewire_core r8169 56396 0 drm_kms_helper 45466 1 i915 drm 197641 4 i915,drm_kms_helper i2c_algo_bit 13199 1 i915 video 19115 1 i915 doug@ubuntu:/sam$ dmesg |grep eth [ 0.116936] i2c-core: driver [aat2870] using legacy suspend method [ 0.116939] i2c-core: driver [aat2870] using legacy resume method [ 1.453811] r8169 0000:03:07.0: eth0: RTL8169sb/8110sb at 0xf840ec00, [BLANKED], XID 10000000 IRQ 16 [ 1.453815] r8169 0000:03:07.0: eth0: jumbo features [frames: 7152 bytes, tx checksumming: ok] [ 25.681231] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 154.037318] r8169 0000:03:07.0: eth0: link down [ 154.037329] r8169 0000:03:07.0: eth0: link down [ 154.037596] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 155.583162] r8169 0000:03:07.0: eth0: link up [ 155.583366] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 156.637048] r8169 0000:03:07.0: eth0: link down [ 156.637066] r8169 0000:03:07.0: eth0: link down [ 156.637339] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 156.773699] r8169 0000:03:07.0: eth0: link down [ 156.773983] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 158.456181] r8169 0000:03:07.0: eth0: link up [ 158.456378] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 159.364468] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 162.384496] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=38877 PROTO=2 [ 166.272457] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 166.422333] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=40695 PROTO=2 [ 168.736049] eth0: no IPv6 routers present [ 183.572472] r8169 0000:03:07.0: eth0: link down [ 183.572490] r8169 0000:03:07.0: eth0: link down [ 183.572934] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 185.204801] r8169 0000:03:07.0: eth0: link up [ 185.205005] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 3620.680451] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 3621.068431] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 3624.912973] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=9118 PROTO=2 [ 3631.088069] eth0: no IPv6 routers present [ 3703.062980] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 3703.465330] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=9210 PROTO=2 [ 3828.062951] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 3833.617772] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=9749 PROTO=2 [ 3953.062920] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 3955.675129] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=15983 PROTO=2 [ 4078.062922] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4078.386319] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=15997 PROTO=2 [ 4203.062899] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4203.559241] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16011 PROTO=2 [ 4328.062833] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4328.930922] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16027 PROTO=2 [ 4453.062811] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4453.950224] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16039 PROTO=2 [ 4578.062742] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4580.626432] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=13738 PROTO=2 [ 4703.062704] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4706.310170] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=15942 PROTO=2 [ 4828.062707] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4832.174324] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16505 PROTO=2 [ 4953.062628] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 4961.469282] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16090 PROTO=2 [ 5078.062552] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5080.776462] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=17239 PROTO=2 [ 5203.070394] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5205.358134] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=17665 PROTO=2 [ 5328.070401] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5330.651139] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=19090 PROTO=2 [ 5453.072279] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5457.085433] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16137 PROTO=2 [ 5578.074492] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5582.359006] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16150 PROTO=2 [ 5703.074410] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5705.070122] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED]--- SRC=192.168.0.10 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=16163 PROTO=2 [ 5828.074387] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED][BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5835.319941] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED][BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=23298 PROTO=2 [ 5953.074429] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED][BLANKED]--- SRC=192.168.0.1 DST=224.0.0.1 LEN=32 TOS=0x00 PREC=0xC0 TTL=1 ID=0 DF PROTO=2 [ 5961.925481] [UFW BLOCK] IN=eth0 OUT= MAC=[BLANKED][BLANKED]--- SRC=192.168.0.5 DST=224.0.0.251 LEN=32 TOS=0x00 PREC=0x00 TTL=1 ID=24261 PROTO=2 doug@ubuntu:/sam$ lspci -nnk |grep -iA2 eth 03:07.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller [10ec:8169] (rev 10) Subsystem: ASUSTeK Computer Inc. Device [1043:11e5] Kernel driver in use: r8169 doug@ubuntu:/sam$ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0 192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0 doug@ubuntu:/sam$ nm-tool NetworkManager Tool State: connected (global) - Device: eth0 [Ifupdown (eth0)] ---------------------------------------------- Type: Wired Driver: r8169 State: connected Default: yes HW Address: [BLANKED] Capabilities: Carrier Detect: yes Speed: 100 Mb/s Wired Properties Carrier: on IPv4 Settings: Address: 192.168.0.7 Prefix: 24 (255.255.255.0) Gateway: 192.168.0.1 DNS: 192.168.0.1 - Device: wlan0 ---------------------------------------------------------------- Type: 802.11 WiFi Driver: iwl3945 State: disconnected Default: no HW Address: 00:19:D2:72:5A:0C Capabilities: Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points ATT592: Infra, 30:60:23:76:FE:60, Freq 2437 MHz, Rate 54 Mb/s, Strength 24 WPA WPA2 doug@ubuntu:/sam$ nslookup ubuntu.com ;; connection timed out; no servers could be reached doug@ubuntu:/sam$ dig ubuntuforums.org ; <<>> DiG 9.8.1-P1 <<>> ubuntuforums.org ;; global options: +cmd ;; connection timed out; no servers could be reached doug@ubuntu:/sam$ sudo ifconfig eth0 up doug@ubuntu:/sam$ dhcpcd eth0 The program 'dhcpcd' can be found in the following packages: * dhcpcd * dhcpcd5 Try: sudo apt-get install <selected package> doug@ubuntu:/sam$ lspci -k 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: agpgart-intel 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) Subsystem: ASUSTeK Computer Inc. Device 1252 Kernel driver in use: i915 Kernel modules: intelfb, i915 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) Subsystem: ASUSTeK Computer Inc. Device 1252 00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel 00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02) Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.1 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 2 (rev 02) Kernel driver in use: pcieport Kernel modules: shpchp 00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: uhci_hcd 00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: uhci_hcd 00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: uhci_hcd 00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: uhci_hcd 00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: ehci_hcd 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel modules: leds-ss4200, iTCO_wdt, intel-rng 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: ata_piix 00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 02) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel modules: i2c-i801 02:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02) Subsystem: Intel Corporation PRO/Wireless 3945ABG Network Connection Kernel driver in use: iwl3945 Kernel modules: iwl3945 03:01.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev b3) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: yenta_cardbus Kernel modules: yenta_socket 03:01.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C552 IEEE 1394 Controller (rev 08) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: firewire_ohci Kernel modules: firewire-ohci 03:01.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 17) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: sdhci-pci Kernel modules: sdhci-pci 03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 08) Subsystem: ASUSTeK Computer Inc. Device 1297 Kernel driver in use: r592 Kernel modules: r592 03:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8169 PCI Gigabit Ethernet Controller (rev 10) Subsystem: ASUSTeK Computer Inc. Device 11e5 Kernel driver in use: r8169 Kernel modules: r8169 doug@ubuntu:/sam$ Things I have tried: sudo start network-manager: no help gksudo gedit /etc/network/interfaces changed line to iface eth0 inet dhcp: no help gksudo gedit /etc/NetworkManager/NetworkManager.conf, I changed managed=false to managed=true. Then sudo service network-manager restart: no help: network is unreachable sudo pkill -9 NetworkManager: no help gksudo gedit /etc/resolve.conf added line nameseriver 8.8.8.8: no help I know very little about networking; to date this has simply worked. Thanks for your help! :- Doug.

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Ninject 3.0 MVC kernel.bind error Auto Registration

- by user295734

Getting and error on kernel.Bind(scanner = ... "scanner" has the little error line under it in VS 2010. Cannot convert lambda expression to type 'System.Type[]' because it is not a delegate type Tyring to Auto Register like the old kernel.scan in 2.0. I can not figure out what i am doing wrong. Added and removed so many Ninject packages. completely lost, getting to be a big waste of time. using System; using System.Web; using Microsoft.Web.Infrastructure.DynamicModuleHelper; using Ninject; using Ninject.Web.Common; //using Ninject.Extensions.Conventions; using Ninject.Web.WebApi; using Ninject.Web.Mvc; using CommonServiceLocator.NinjectAdapter; using System.Reflection; using System.IO; using LR.Repository; using LR.Repository.Interfaces; using LR.Service.Interfaces; using System.Web.Http; public static class NinjectWebCommon { private static readonly Bootstrapper bootstrapper = new Bootstrapper(); /// <summary> /// Starts the application /// </summary> public static void Start() { DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule)); DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule)); bootstrapper.Initialize(CreateKernel); } /// <summary> /// Stops the application. /// </summary> public static void Stop() { bootstrapper.ShutDown(); } /// <summary> /// Creates the kernel that will manage your application. /// </summary> /// <returns>The created kernel.</returns> private static IKernel CreateKernel() { var kernel = new StandardKernel(); kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel); kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>(); RegisterServices(kernel); return kernel; } /// <summary> /// Load your modules or register your services here! /// </summary> /// <param name="kernel">The kernel.</param> private static void RegisterServices(IKernel kernel) { kernel.Bind(scanner => scanner.FromAssembliesInPath(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)) .Select(IsServiceType) .BindToDefaultInterface() .Configure(binding => binding.InSingletonScope()) ); } private static bool IsServiceType(Type type) { // temp return true; // .Any() is not recognized either. return true; // type.IsClass && type.GetInterfaces().Any(intface => intface.Name == "I" + type.Name); }

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1000 HZ linux kernel necessary if I have tickless and high resolution timer?

- by Bob

I am trying to improve performance on my server. I have a few processes that need low jitter (less than 10ms variance). I have a load average of 4 maximum on an i7-920 (4 physical cores, 8 with HT). There are about 10 processes ranging from 40% to 90% of a core user mode. System usage is 3% total. Total CPU usage is 80% max. Will setting the kernel from 100hz to 1000hz improve the jitter if tickless and high resolution timers are already set? This page seems to indicate it still does something. https://lkml.org/lkml/2009/4/28/401 How about changing from voluntary (PREEMPT_VOLUNTARY) to preemptible (PREEMPT)?

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Forcing Kernel::method_name to be called in Ruby

- by Peter

I want to add a foo method to Ruby's Kernel module, so I can write foo(obj) anywhere and have it do something to obj. Sometimes I want a class to override foo, so I do this: module Kernel private # important; this is what Ruby does for commands like 'puts', etc. def foo x if x.respond_to? :foo x.foo # use overwritten method. else # do something to x. end end end this is good, and works. but, what if I want to use the default Kernel::foo in some other object that overwrites foo? Since I've got an instance method foo, I've lost the original binding to Kernel::foo. class Bar def foo # override behaviour of Kernel::foo for Bar objects. foo(3) # calls Bar::foo, not the desired call of Kernel::foo. Kernel::foo(3) # can't call Kernel::foo because it's private. # question: how do I call Kernel::foo on 3? end end Is there any clean way to get around this? I'd rather not have two different names, and I definitely don't want to make Kernel::foo public.

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Windows CE Remote Kernel Tracker - gathering data in one (more) file during a log period of time

- by Nic

I'm using the "Windows CE Kernel Tracker" tool to gather data from my embedded device. This is working fine for short period of time. It seems that the tool is getting data in memory and not on disk. I'm wondering if there is a way to take the data from the device and log it in one or more file on my development computer. This could be useful for long time test period : for instance, one night or one entire day. Any ideas? p.s. I don't want to log on to the device, I want to log on my development PC.

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Tell the linux kernel to put a file in the disk cache?

- by Rory

Is there any command to for a file to be read in and loaded into the linux disk cache? This is on an up-to-date debian system. I know in the general case, it's better to let the linux kernel figure this out. But I have an edge case. I have a laptop that has an NFS director mounted, and i want to play a long video file, but I don't want to have a network problem interrupt the playnig. I know that (largeish) file will be read in it's entirety later on. I know that nothing else (really) will be running while playing this video. There is enough free memory to store this file. (I know I could just copy the file into a new tmpfs filesystem, but I'm curious if there's an even shorter way to do it)

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My cpus are powered down periodically

- by mgiammarco

I post here because I am using Ubuntu but this is probably an hardware problem. Since I bought my new setup with AMD Athlon(tm) II X4 635 Processor and asus m4a89td pro/usb3 motherboard with ecc ram I have stuttering on videos. I was using ubuntu 11.10 now ubuntu 12.10. Looking at syslog I have found that periodically (I notice only on videos but it happens always) this thing happens: Mar 6 23:36:42 virtual1 kernel: [28564.375548] smpboot: CPU 1 is now offline Mar 6 23:36:42 virtual1 kernel: [28564.380751] smpboot: CPU 2 is now offline Mar 6 23:36:42 virtual1 kernel: [28564.394947] smpboot: CPU 3 is now offline Mar 6 23:36:48 virtual1 kernel: [28569.917021] smpboot: Booting Node 0 Processor 1 APIC 0x1 Mar 6 23:36:48 virtual1 kernel: [28569.928015] LVT offset 0 assigned for vector 0xf9 Mar 6 23:36:48 virtual1 kernel: [28569.928372] [Firmware Bug]: cpu 1, try to use APIC500 (LVT offset 0) for vector 0x400, but the register is already in use for vector 0xf9 on another cpu Mar 6 23:36:48 virtual1 kernel: [28569.928378] perf: IBS APIC setup failed on cpu #1 Mar 6 23:36:48 virtual1 kernel: [28569.931305] process: Switch to broadcast mode on CPU1 Mar 6 23:36:48 virtual1 kernel: [28569.934255] smpboot: Booting Node 0 Processor 2 APIC 0x2 Mar 6 23:36:48 virtual1 kernel: [28569.945554] [Firmware Bug]: cpu 2, try to use APIC500 (LVT offset 0) for vector 0x400, but the register is already in use for vector 0xf9 on another cpu Mar 6 23:36:48 virtual1 kernel: [28569.945558] perf: IBS APIC setup failed on cpu #2 Mar 6 23:36:48 virtual1 kernel: [28569.948124] process: Switch to broadcast mode on CPU2 Mar 6 23:36:48 virtual1 kernel: [28569.949644] smpboot: Booting Node 0 Processor 3 APIC 0x3 Mar 6 23:36:48 virtual1 kernel: [28569.960838] [Firmware Bug]: cpu 3, try to use APIC500 (LVT offset 0) for vector 0x400, but the register is already in use for vector 0xf9 on another cpu Mar 6 23:36:48 virtual1 kernel: [28569.960840] perf: IBS APIC setup failed on cpu #3 Mar 6 23:36:48 virtual1 kernel: [28569.962953] process: Switch to broadcast mode on CPU3 I have: updated bios; tried all (really) bios options; changed ram; changed psu and cpu cooler; tried 3.8.1 kernel. What can I do now? Please help me! Thanks, Mario

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How to specify this 'symbolic link' for the Jungo WinDriver?

- by user252098

Just now , I try to install the Jungo WinDriver in the Ubuntu 13.10 . But I am puzzled by the its manual : 4.2.3. Linux WinDriver Installation Instructions 4.2.3.1. Preparing the System for Installation In Linux, kernel modules must be compiled with the same header files that the kernel itself was compiled with. Since WinDriver installs kernel modules, it must compile with the header files of the Linux kernel during the installation process. Therefore, before you install WinDriver for Linux, verify that the Linux source code and the file version.h are installed on your machine: Install the Linux kernel source code: If you have yet to install Linux, install it, including the kernel source code, by following the instructions for your Linux distribution. If Linux is already installed on your machine, check whether the Linux source code was installed. You can do this by looking for 'linux' in the /usr/src directory. If the source code is not installed, either install it, or reinstall Linux with the source code, by following the instructions for your Linux distribution. Install version.h: The file version.h is created when you first compile the Linux kernel source code. Some distributions provide a compiled kernel without the file version.h. Look under /usr/src/linux/include/linux to see whether you have this file. If you do not, follow these steps: Become super user: $ su Change directory to the Linux source directory: cd /usr/src/linux Type: make xconfig Save the configuration by choosing Save and Exit. Type: make dep Exit super user mode: exit To run GUI WinDriver applications (e.g., DriverWizard [5]; Debug Monitor [7.2]) you must also have version 5.0 of the libstdc++ library — libstdc++.so.5. If you do not have this file, install it from the relevant RPM in your Linux distribution (e.g., compat-libstdc++). Before proceeding with the installation, you must also make sure that you have a linux symbolic link. If you do not, create one by typing /usr/src$ ln -s 'target kernel'/linux For example, for the Linux 2.4 kernel type /usr/src$ ln -s linux-2.4/ linux ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I can't understand how to specify these two parameters in my Ubuntu .

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Creating own Amazon Machine Image - Kernel panic

- by amra

I have created own AMI and registered it on Amazon EC2. But while AMI startup I receive following error: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1) The image is running locally without any problems. fstab contains: proc /proc proc defaults 0 0 /dev/sda1 / ext3 relatime,errors=remount-ro 0 1 thx for help

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Out of disk space - /boot at 100%

- by uvasal

My /boot is at 100%. When I run aptitude search ~ilinux-image I'm getting loads of unused images. When I try to delete one of them (after checking which one is currently in use by doing uname -r), e.g apt-get autoremove linux-image-3.2.0-44-generic I get: Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: linux-generic : Depends: linux-headers-generic (= 3.2.0.51.61) but 3.2.0.54.64 is to be installed linux-server : Depends: linux-headers-server (= 3.2.0.51.61) but 3.2.0.54.64 is to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). And running apt-get -f install throws No space left on device. I've also tried doing apt-get purge but I am getting the same thing. Output of df -h and dpkg -l linux-*.: root@hb2088:/srv/www# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 9.4G 3.0G 6.0G 34% / udev 301M 4.0K 301M 1% /dev tmpfs 124M 228K 124M 1% /run none 5.0M 0 5.0M 0% /run/lock none 309M 0 309M 0% /run/shm /dev/sda1 92M 91M 0 100% /boot root@hb2088:/srv/www# dpkg -l linux-* Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Description +++-====================================================-====================================================-======================================================================================================================== un linux-doc-3.2.0 <none> (no description available) ii linux-firmware 1.79.6 Firmware for Linux kernel drivers iU linux-generic 3.2.0.51.61 Complete Generic Linux kernel un linux-headers <none> (no description available) un linux-headers-3 <none> (no description available) un linux-headers-3.0 <none> (no description available) ii linux-headers-3.2.0-44 3.2.0-44.69 Header files related to Linux kernel version 3.2.0 ii linux-headers-3.2.0-44-generic 3.2.0-44.69 Linux kernel headers for version 3.2.0 on 64 bit x86 SMP ii linux-headers-3.2.0-45 3.2.0-45.70 Header files related to Linux kernel version 3.2.0 ii linux-headers-3.2.0-45-generic 3.2.0-45.70 Linux kernel headers for version 3.2.0 on 64 bit x86 SMP ii linux-headers-3.2.0-48 3.2.0-48.74 Header files related to Linux kernel version 3.2.0 ii linux-headers-3.2.0-48-generic 3.2.0-48.74 Linux kernel headers for version 3.2.0 on 64 bit x86 SMP ii linux-headers-3.2.0-51 3.2.0-51.77 Header files related to Linux kernel version 3.2.0 ii linux-headers-3.2.0-51-generic 3.2.0-51.77 Linux kernel headers for version 3.2.0 on 64 bit x86 SMP ii linux-headers-3.2.0-52 3.2.0-52.78 Header files related to Linux kernel version 3.2.0 ii linux-headers-3.2.0-52-generic 3.2.0-52.78 Linux kernel headers for version 3.2.0 on 64 bit x86 SMP iU linux-headers-3.2.0-54 3.2.0-54.82 Header files related to Linux kernel version 3.2.0 iU linux-headers-3.2.0-54-generic 3.2.0-54.82 Linux kernel headers for version 3.2.0 on 64 bit x86 SMP iU linux-headers-generic 3.2.0.54.64 Generic Linux kernel headers iU linux-headers-server 3.2.0.54.64 Linux kernel headers on Server Equipment. un linux-image <none> (no description available) un linux-image-3.0 <none> (no description available) ii linux-image-3.2.0-44-generic 3.2.0-44.69 Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii linux-image-3.2.0-45-generic 3.2.0-45.70 Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii linux-image-3.2.0-48-generic 3.2.0-48.74 Linux kernel image for version 3.2.0 on 64 bit x86 SMP iF linux-image-3.2.0-51-generic 3.2.0-51.77 Linux kernel image for version 3.2.0 on 64 bit x86 SMP iF linux-image-3.2.0-52-generic 3.2.0-52.78 Linux kernel image for version 3.2.0 on 64 bit x86 SMP in linux-image-3.2.0-54-generic <none> (no description available) iU linux-image-generic 3.2.0.51.61 Generic Linux kernel image iU linux-image-server 3.2.0.51.61 Linux kernel image on Server Equipment. un linux-initramfs-tool <none> (no description available) un linux-kernel-headers <none> (no description available) un linux-kernel-log-daemon <none> (no description available) ii linux-libc-dev 3.2.0-52.78 Linux Kernel Headers for development un linux-restricted-common <none> (no description available) iU linux-server 3.2.0.51.61 Complete Linux kernel on Server Equipment. un linux-source-3.2.0 <none> (no description available) un linux-tools <none> (no description available) Output of du -sh /boot/*: root@hb2088:~# du -sh /boot/* 781K /boot/abi-3.2.0-44-generic 781K /boot/abi-3.2.0-45-generic 781K /boot/abi-3.2.0-48-generic 781K /boot/abi-3.2.0-51-generic 781K /boot/abi-3.2.0-52-generic 139K /boot/config-3.2.0-44-generic 139K /boot/config-3.2.0-45-generic 139K /boot/config-3.2.0-48-generic 139K /boot/config-3.2.0-51-generic 139K /boot/config-3.2.0-52-generic 1.6M /boot/grub 14M /boot/initrd.img-3.2.0-44-generic 14M /boot/initrd.img-3.2.0-45-generic 14M /boot/initrd.img-3.2.0-48-generic 12K /boot/lost+found 174K /boot/memtest86+.bin 176K /boot/memtest86+_multiboot.bin 2.8M /boot/System.map-3.2.0-44-generic 2.8M /boot/System.map-3.2.0-45-generic 2.8M /boot/System.map-3.2.0-48-generic 2.8M /boot/System.map-3.2.0-51-generic 2.8M /boot/System.map-3.2.0-52-generic 4.8M /boot/vmlinuz-3.2.0-44-generic 4.8M /boot/vmlinuz-3.2.0-45-generic 4.8M /boot/vmlinuz-3.2.0-48-generic 4.8M /boot/vmlinuz-3.2.0-51-generic 4.8M /boot/vmlinuz-3.2.0-52-generic

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