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• in HFT trading should I upgrade from Windows Server 2008 R2 to Windows Server 2012?

  - by javapowered

  I'm using HP DL360p Gen8 + Windows Server 2008 R2 for HFT trading. That means that every 10 microseconds is important for me. I do understand that if I need everything to be so fast I probably should consider using Linux. But in this post I want to compare only Windows Server 2008 R2 and Windows Server 2012. I've found in internet couple articles that suggest how to tune Windows Server 2012 for low latency http://msdn.microsoft.com/library/windows/hardware/jj248719 http://technet.microsoft.com/en-us/library/hh831415.aspx Most part of optimizations from these articles apply only to Windows Server 2012 and can not be used on Windows Server 2008 R2. So now I think that as I can optimize Windows Server 2012 for low latency, probaly I should upgrade? After optimizations how much faster windows server 2012 would be (ideally in microseconds :)?

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• Effects of HTTP/TCP connection handshakes and server performance

  - by Blankman

  When running apache bench on the same server as the website like: ab -n 1000 -c 10 localhost:8080/ I am most probably not getting accurate results when compared to users hitting the server from various locations. I'm trying to understand how or rather why this will effect real world performance since a user in china will have different latency issues when compared to someone in the same state/country. Say my web server has a maximum thread limit of 100. Can someone explain in detail how end user latency can/will effect server performance. I'm assuming here that each request will be computed equally at say 10ms. What I'm not understand is how external factors can effect overal server performance, specifically internet connections (location, or even device like mobile) and http/tcp handshakes etc.

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• Basic networking problem with Ubuntu 9.04 on Acer Extensa 5635Z laptop

  - by sapporo

  I just installed Ubuntu 9.04 on a brand new Acer Extensa 5635Z laptop, but ethernet networking does't work (wireless doesn't work either, but I'd be happy with ethernet for now). eth0 isn't listed in /etc/network/interfaces: $ cat /etc/network/interfaces auto lo iface lo inet loopback lshw does show the nic, but I can't make much sense out of the information: $ sudo lshw -class network -sanitize *-network DISABLED description: Wireless interface product: AR928X Wireless Network Adapter (PCI-Express) vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:07:00.0 logical name: wmaster0 version: 01 serial: [REMOVED] width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix bus_master cap_list logical ethernet physical wireless configuration: broadcast=yes driver=ath9k latency=0 module=ath9k multicast=yes wireless=IEEE 802.11bgn *-network UNCLAIMED description: Ethernet controller product: Attansic Technology Corp. vendor: Attansic Technology Corp. physical id: 0 bus info: pci@0000:09:00.0 version: c0 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd cap_list configuration: latency=0 *-network DISABLED description: Ethernet interface physical id: 1 logical name: pan0 serial: [REMOVED] capabilities: ethernet physical configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A link=yes multicast=yes Thanks for your help!

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• When to increase AWS RDS MySQL Server instance to larger CPU/RAM?

  - by rksprst

  I'm wondering at what stage do I need to increase the image for the RDS MySQL server to a larger CPU/RAM instance. The CPU utilization graph is near 0. The Avg Free Memory is around 150MB. The Avg Swap Usage is 420MB. Read Latency is 0-20ms/op it spikes up randomly. Avg write latency is on average 5ms/op but spikes up to 10-20ms/op. Are there some common rules here that I should follow? Thanks!

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• iis 7.0 output caching

  - by george9170

  My company is serving up deep-zoom maps. We have 100'000s jpg images being served up and was wondering if output caching would be the way to go. Our problem is latency on serving the images. I was wondering if i output caching would indeed improve latency and a general explanation about output caching. I have visisted http://blogs.iis.net/bills/archive/2007/05/02/iis7-output-caching-for-dynamic-content-dramatically-speed-up-your-asp-and-php-applications.aspx and was wondering if there are any other good sites to look at. thank you very much.

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• Problem with intel chipset 4 serie and centos dealing with dual head

  - by Antoine

  I've a fujitsu lifebook S7220, it's been a while since i try to configure it to use a dual head with centos 5.4 x86_64. Everytime I try, the xserver crash... I've got an intel chipset mobile 4 serie (GMA 4500MHD, if I recall good!) When I do an lspci -v i've got these : 00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller]) Subsystem: Fujitsu Limited. Unknown device 1451 Flags: bus master, fast devsel, latency 0, IRQ 177 Memory at f2000000 (64-bit, non-prefetchable) [size=4M] Memory at d0000000 (64-bit, prefetchable) [size=256M] I/O ports at 1800 [size=8] Capabilities: [90] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Capabilities: [d0] Power Management version 3 00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) Subsystem: Fujitsu Limited. Unknown device 1451 Flags: bus master, fast devsel, latency 0 Memory at f2400000 (64-bit, non-prefetchable) [size=1M] Capabilities: [d0] Power Management version 3 My question is, anyone already got this problem and how did you fix it? Thank you for your answer!

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• Calculating RAM Performance? Example: DDR3-2133 CL9-11-10-28 1.65V vs DDR3-1600 CL10-10-10-30 1.5V

  - by user1131467

  How do you calculate the relative performance of PC RAM? For example, what is the relative performance of the following: G.Skill Ripjaws Z 8 x 4GB Kit, DDR3-2133, [email protected] G.Skill Ripjaws Z 4 x 8GB Kit, DDR3-1600, [email protected] If it's relevant, when they are used in a top of the line ASUS Rampage IV Extreme motherboard and Intel i7 3960X? By performance, I mean relative: read latency write latency read bandwidth write bandwidth Please include working. (I mean how did you arrive at the figures based on timing and DDR3-speed)

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• Is it possible to add tcp autotuning to windows xp?

  - by Caspin

  I have a network application that needs to send messages at 60 times a second. The messages are usually 300-400 bytes, but can be as large as 1500. The default setting for SO_SNDBUF is too small and limits the number of message that can be sent if the network latency is anything greater then 100ms. The naive solution is to just bump the SO_SNDBUF size to to something large. However, depending on the latency and the packet size that could be anywhere from 64K to 8MB. One of Vista's new features is TCP autotuning. Autotuning monitors the tcp connection and dynamically adjust the buffer sizes to allow for optimal communication. I would like to use auto tuning on our windows xp machine so I don't need to guess what my buffers sizes should be. Is there a way to install either a microsoft or 3rd party tcp autotuner on windows xp?

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• Is it possible to add tcp autotuning to windows xp?

  - by Caspin

  I have a network application that needs to send messages at 60 times a second. The messages are usually 300-400 bytes, but can be as large as 1500. The default setting for SO_SNDBUF is too small and limits the number of message that can be sent if the network latency is anything greater then 100ms. The naive solution is to just bump the SO_SNDBUF size to to something large. However, depending on the latency and the packet size that could be anywhere from 64K to 8MB. One of Vista's new features is TCP autotuning. Autotuning monitors the tcp connection and dynamically adjust the buffer sizes to allow for optimal communication. I would like to use auto tuning on our windows xp machine so I don't need to guess what my buffers sizes should be. Is there a way to install either a microsoft or 3rd party tcp autotuner on windows xp?

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• Testing performance from around the world - how do I get a linux shell easily in multiple countries?

  - by Matthew O'Riordan

  We are building a socket based service where latency is paramount, and as such we have servers distributed into 7 data centres around the world. However, whilst we know we're bringing the servers closer to the clients, it's very difficult to know how effective this is, and importantly, what difference this makes compared to our competitors. As such, we want to run simple scripts that test latency and throughput for both our service and our competitors, which is easy enough using Amazon, however Amazon only have 7 data centres. We would like to know for example how we perform in locations all over the world such as South Africa, Australia, China, Peru etc. Does anyone know of any service where we could piggy back off their global infrastructure and run some scripts to test this performance? The obvious contenders are people like Monitis, but I don't think they would allow us to run custom scripts, only standard protocol monitors. Thanks for your help. Matt

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• What we have to measure for measuring server performance If we can't measure the server processing time from client side?

  - by AsadYarKhan

  If we can not measure the server processing time from client side then which attributes will be good to measure in client side for measuring server side performance and What attributes are important ? I know we can get the server response time, latency and Throughput etc,but how do we understand/interpret the result of server side from these attrubutes. How can we analyse that whether my code is taking lots of time,whether Web Server, whether it is because of Server Machine(H/W).how would i know that which thing needs to be upgrade or improve.Please tell me any article or any book something that I need to study or explain here If you can so I can interpret the result of server side using these attributes response time, latency and throughput.You can tell other performance attribute if I need to understand the server result.

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• SQLIO help decipher output

  - by SQL Learner

  When load testing on a SQL Server Box, using following (testfile is 25 GB) sqlio -kW -t8 -s360 -o8 -frandom -b8 -BH -LS g:\testfile.dat > result.txt sqlio -kW -t8 -s360 -o8 -frandom -b64 -BH -LS g:\testfile.dat >> result.txt sqlio -kW -t8 -s360 -o8 -frandom -b128 -BH -LS g:\testfile.dat >> result.txt sqlio -kW -t8 -s360 -o8 -frandom -b256 -BH -LS g:\testfile.dat >> result.txt Can anyone help me decipher output.. I do not understand latency min and average....? What does this number means IOs/sec: 10968.80 MBs/sec: 685.55 latency metrics: Min_Latency(ms): 1 Avg_Latency(ms): 5 Max_Latency(ms): 21

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• Relating ping to perceived browser GUI response

  - by cvsdave

  We periodically get complaints of poor GUI (browser page) response that we need to explore. I am looking for a quick and cheap first check to see if the issue is network latency, or server performance. Has anyone encountered any discussion of ping time and perceived GUI response? I understand that GUI response is complicated, but it would be nice if we could find or develop a rule of thumb along the lines of "Hmmmm, ping is over 200, it might be network problems". Ideally, this lives in a script on the user's machine so that we can see the latency that they are seeing... (BASH, Linux). A reference to a good discussion page would be a fine answer, as would any recommendation of other source material.

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• Synced audio ouput on multiple machines? VLC? hardware solutions?

  - by zimmer62

  I'm wondering if there is any software or hardware solutions to synced audio or audio and video across multiple computers or devices on a network. I've seen Sonos, and it might be a good solution, but it's also a very expensive solution. I'd like to be able to play something with realtime audio output on one PC, but hear it on speakers throughout the house, being it the home theater receiver, or another computer in another room. I saw a solution using the apple iport express, but the latency was unacceptable for anything other than just music. I'd like to avoid running audio wires with baluns to a bunch of amplifiers scattered all over the place when I have cat5 run everywhere. Is anyone familiar with using this kind of process for whole home audio? The latency is a big deal for me, if I've got video attached to the sound (e.g. watching a hockey game)

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• How do I install a driver for an Atheros AR9285?

  - by Fernando

  How to install the driver for Atheros AR9285 in Ubuntu 11.10. Still no package for 11.10 according to this https://help.ubuntu.com/community/WifiDocs/Device/Atheros/AR9285 Here is the output of the commands marc@fer-VPCYA1V9E:~$ sudo lshw -class network *-network DISABLED description: Wireless interface product: AR9285 Wireless Network Adapter (PCI-Express) vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 01 serial: 4c:0f:6e:d6:65:cc width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=ath9k driverversion=3.0.0-12-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:16 memory:d3400000-d340ffff *-network description: Ethernet interface product: AR8131 Gigabit Ethernet vendor: Atheros Communications physical id: 0 bus info: pci@0000:03:00.0 logical name: eth0 version: c0 serial: 54:42:49:a2:1f:bc capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI firmware=N/A latency=0 link=no multicast=yes port=twisted pair resources: irq:43 memory:d2400000-d243ffff ioport:1000(size=128) And the second command marc@fer-VPCYA1V9E:~$ rfkill list 0: sony-wifi: Wireless LAN Soft blocked: no Hard blocked: no 1: sony-bluetooth: Bluetooth Soft blocked: no Hard blocked: no 2: phy0: Wireless LAN Soft blocked: no Hard blocked: no 3: hci0: Bluetooth Soft blocked: no Hard blocked: no 4: acer-wireless: Wireless LAN Soft blocked: yes Hard blocked: no Is there a way to make it work?

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• Wireless doesn't work on a Lenovo V570

  - by Stephen

  I've had Ubuntu installed on my HD for about 3 months but ever since I ran into this wireless issue I kinda lost my lust of Ubuntu. I have zero experience getting around with/ using the console command. I have a Lenovo V570. I got the driver update for the broadcom networking card via the Additional Drivers application but that did nothing. I love the look and feel of using Ubuntu but I have no technological experience for the matter. Any help would be awesome. When I scan for wireless connections while in Ubuntu, my computer picks up nothing, while on Win7 it will pick up the handful of wireless networks around my area. My wired connection is fine, but the use of not having wireless on a laptop is rather contradictory to it as a feature. Cheers! Also, I just installed 11.10, if that helps any. Yes, I used the search before I posted this, but again I have ZERO understanding of the command stuff and need a meat and potatoes answer(s). stephen@ubuntu:~$ sudo lshw -class network [sudo] password for stephen: *-network UNCLAIMED description: Network controller product: BCM4313 802.11b/g/n Wireless LAN Controller vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:03:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:f1900000-f1903fff *-network description: Ethernet interface product: RTL8111/8168B PCI Express Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:04:00.0 logical name: eth0 version: 06 serial: f0:de:f1:63:98:14 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168e-2.fw ip=192.168.1.78 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:41 ioport:2000(size=256) memory:f1804000-f1804fff memory:f1800000-f1803fff stephen@ubuntu:~$ rfkill list all 0: ideapad_wlan: Wireless LAN Soft blocked: yes Hard blocked: no 1: acer-wireless: Wireless LAN Soft blocked: yes Hard blocked: no

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• Laptop with Intel Graphics: external VGA monitor only gets signal on boot (no "hot plugging")

  - by iveand

  I am able to get an external VGA monitor (or projector) to work if I start my laptop with it connected. However, if I start the laptop with it disconnected there is no signal on the external. The Displays screen shows the external, and thinks that it is active, but there is no signal being sent to it. This has been a persistent problem since 10.04 (I am now on 12.04.... each upgrade hoping something is improved). I should note that even when it works (starting with display connected), Displays still says the monitor is "unknown" (but it sends the signal). For the correct resolution to display, I have had to add a few xrandr lines for my monitor to my .xprofile file... otherwise resolution is limited to default 1024x768. So, resolution issues can be worked around, but the main issue is that the external doesn't get a signal without starting the machine with it connected. I have tried: adding i915.modeset=1 to grub (also i965.modeset=1 since someone posted that this helped even though lshw shows i915) adding following ppa and doing a dist-upgrade: sudo add-apt-repository ppa:xorg-edgers/ppa Here are the details: Laptop: Toshiba Tecra M10 lspci listings for video: 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) sudo lshw -C video listing: *-display:0 description: VGA compatible controller product: Mobile 4 Series Chipset Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 07 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:46 memory:ff400000-ff7fffff memory:e0000000-efffffff ioport:cff8(size=8) *-display:1 UNCLAIMED description: Display controller product: Mobile 4 Series Chipset Integrated Graphics Controller vendor: Intel Corporation physical id: 2.1 bus info: pci@0000:00:02.1 version: 07 width: 64 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: latency=0 resources: memory:ffc00000-ffcfffff "System Info" shows my graphics as the following Mobile Intel® GM45 Express Chipset x86/MMX/SSE2

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• Rackspace Cloud Servers in Europe?

  - by mit

  We have setup a cloud virtual server at rackspace in the US, but we use it from Europe. I found out I am not quite happy with the response time. Of course I knew that there would be some latency. But I am not sure if it is the overseas latency (ping is 120ms) or also the minimal resources. It is the smallest machine, 256 MB, 10 GB, running a Mediawiki on Ubuntu 10.04 64 bit. The Instance lives in the rackspace ORD1 datacenter. As soon as they have opened their new facilities in the UK we plan moving the incstance there. But we are planing more machines already. The pricing is quite attractive. I don't really want to do some measuring and benchmarking and this stuff, so I am asking just for your opinions and it would be nice to hear what you can tell from your experience. Maybe someone who uses such small instances in the US. And what can we really expect if we upgrade to more resources.

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• wireless detected but Can't connect to network, Wifi card intel pro wireless N100 BGN

  - by Alexandre777

  Thanks in advance, I installed Linux Mint kernel 3.0.0-12 x64 ,wireless is detected and I configure it in network manager but can't coonect, there are the results of command line: $ iwconfig lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=off Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off $ sudo lshw -C network** *-network description: Wireless interface product: Centrino Wireless-N 1000 vendor: Intel Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 00 serial: 00:1e:64:51:c9:d6 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlagn driverversion=3.0.0-12-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:48 memory:d7400000-d7401fff *-network description: Ethernet interface product: AR8131 Gigabit Ethernet vendor: Atheros Communications physical id: 0 bus info: pci@0000:06:00.0 logical name: eth0 version: c0 serial: 48:5b:39:99:8f:16 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI duplex=full firmware=N/A ip=192.168.1.2 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:51 memory:d3800000-d383ffff ioport:8000(size=128 $ rfkill list all 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Thank you.

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• Cannot enable wireless on an Intel WifiLink 1000 on an Lenovo Ideapad z570

  - by Brij

  I am using the ubuntu 11.10 on lenovo ideapad z570. My wireless internet is not working. I have ensure that wireless switch is on. Windows 7, wireless works great.However ubuntu 11.10 is not allowing me to enable wireless connection. I have run the following command and here is the status. sudo lshw -class network *-network DISABLED description: Wireless interface product: Centrino Wireless-N 1000 vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 00 serial: 74:e5:0b:1c:a4:a4 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlagn driverversion=3.0.0-12-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:42 memory:d0500000-d0501fff *-network description: Ethernet interface product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: eth0 version: 05 serial: f0:de:f1:64:b6:62 size: 10Mbit/s capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8105e-1.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s resources: irq:41 ioport:2000(size=256) memory:d0404000-d0404fff memory:d0400000-d0403fff Here is rfkill list all output: rfkill list all 0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: no 1: phy0: Wireless LAN Soft blocked: no Hard blocked: no 2: acer-wireless: Wireless LAN Soft blocked: yes Hard blocked: no Note : Windows 7, wireless card property shows that Intel WifiLink 1000 BGN. Could someone help me to fix this issue.

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• How to switch sound-drivers, and to which? [AMD] Hudson Azalia Controller

  - by Anders Martini

  System settings/sound does not open, freezes and I have to force close. Speaker symbol with volume control does not open scroll-down menu, and there is no sounds. Many people have problems with Hudson Azalia in Ubuntu, but I found no working solution. I don't really understand much of this, but here are some more details: aplay -l : **** List of PLAYBACK Hardware Devices **** (after running this one, it starts some kind of process that doesn't get any results, and doesn't stop, terminal has to be shut down) lspci -vnn | grep -iA5 audio: 00:01.1 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI Device [1002:9902] Subsystem: Hewlett-Packard Company Device [103c:184c] Flags: bus master, fast devsel, latency 0, IRQ 53 Memory at f0444000 (32-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel -- 00:14.2 Audio device [0403]: Advanced Micro Devices [AMD] Hudson Azalia Controller [1022:780d] (rev 01) Subsystem: Hewlett-Packard Company Device [103c:184c] Flags: bus master, slow devsel, latency 32, IRQ 54 Memory at f0440000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: snd_hda_intel It seems to me that I'm currently running hda Intel drivers on my AMD Hudson Azalia soundcard. I can't see what drivers this soundcard uses. Do I need any additional drivers for my soundcard, and where would I find them?

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• Cannot make Wi-Fi hotspot

  - by Junaid

  I want to make my laptop as wi-fi hotspot. To do so, I pressed button Settings-Network-Wireless-Use as Hotspot.. Then it creates a wireless network connection 'Hostspot' and connects. But it gets disconnected just after making connection. Here is my network hardware info: sudo lshw -C network *-network description: Wireless interface product: WiFi Link 5100 vendor: Intel Corporation physical id: 0 bus info: pci@0000:04:00.0 logical name: wlan0 version: 00 serial: width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlagn driverversion=3.0.0-12-generic firmware=8.83.5.1 build 33692 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn resources: irq:47 memory:d9200000-d9201fff *-network description: Ethernet interface product: RTL8111/8168B PCI Express Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:05:00.0 logical name: eth0 version: 02 serial: size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd 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=r8169 driverversion=2.3LK-NAPI duplex=full firmware=N/A ip=192.168.1.4 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:45 ioport:2000(size=256) memory:d5010000-d5010fff memory:d5000000-d500ffff memory:d5020000-d502ffff My machine is running on Ubuntu 11.10 Can anybody help in it? Thanks

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• SD Card Reader not working in Ubuntu 12.04

  - by tripkane

  I have a read many other posts on this issue and believe that Ubuntu 12.04 is not even recognizing my SD Card Reader as just that: Computer Model: Metabox (Australian builder of Clevo laptops) / Clevo P150EM OS: Ubuntu 12.04 (64 Bit) CPU: Intel(R) Core(TM) i7-3720QM CPU @ 2.60GHz HD: 120GB Intel 550/520MB/s SSD According to the people who built my computer, the specs of the SD Card reader in my comp are as follows: Manufacture: Realtek Semiconduct Corp. Location: PCI bus 3 Hardware ID: PCI\Ven_10EC&DEV_5289&SUBSYS_51051558 Physical device object name: \Device\NTPNP_PCI0015 Here are the relevant outputs of the following commands run from the terminal: sudo lshw *-generic UNCLAIMED description: Unassigned class product: Realtek Semiconductor Co., Ltd. vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 version: 01 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list configuration: latency=0 resources: memory:f6a00000-f6a0ffff sudo lspci -v -nn 03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device [10ec:5289] (rev 01) Subsystem: CLEVO/KAPOK Computer Device [1558:5105] Flags: bus master, fast devsel, latency 0, IRQ 4 Memory at f6a00000 (32-bit, non-prefetchable) [size=64K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Endpoint, MSI 00 Capabilities: [b0] MSI-X: Enable- Count=1 Masked- Capabilities: [d0] Vital Product Data Capabilities: [100] Advanced Error Reporting Capabilities: [140] Virtual Channel Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00 Does the unassigned details of these outputs mean that Ubunutu desn't know that the SD Card Reader is one and what do with it? and if so how should I go about fixing it?? Cheers ;)

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• Network really slow with TL-WN951N wireless card

  - by Sam

  I literally just installed ubuntu and it seems to be working great except the network is deadly slow. I'm running a TL-WN951N wireless card which can download at about 600-700 KB/s in windows but in Ubuntu the max speed it seems to get is around 5KB/s. I guess I should note that my WAP is only wireless-G but like I said, I can get much better speeds in Windows. I'm testing the speeds by downloading files from here: http://mirror.internode.on.net/pub/test/ Anyone have any idea? I saw some people recommend downloading drivers and compiling them myself but I'm really really new to all of this so would appreciate someone babying me through it so I don't brick my computer! Here are the results of lspci -v: 04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02) Subsystem: Giga-byte Technology GA-EP45-DS5 Motherboard Flags: bus master, fast devsel, latency 0, IRQ 44 I/O ports at c000 [size=256] Memory at e9110000 (64-bit, prefetchable) [size=4K] Memory at e9100000 (64-bit, prefetchable) [size=64K] [virtual] Expansion ROM at e9120000 [disabled] [size=64K] Capabilities: <access denied> Kernel driver in use: r8169 Kernel modules: r8169 05:02.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01) Subsystem: Atheros Communications Inc. Device 3071 Flags: bus master, 66MHz, medium devsel, latency 168, IRQ 18 Memory at e9200000 (32-bit, non-prefetchable) [size=64K] Capabilities: <access denied> Kernel driver in use: ath9k Kernel modules: ath9k

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• Gnome-Network-Manager Config File Migration

  - by Jorge

  I think I have an issue with gnome-network-manager, I used to have a lot of connections configured, Wireless, Wired and VPN. After upgrading to 12.04 (from 11.10) I lost every configuration. I realized that the configs that used to be saved in $HOME/.gconf/system/networking/connections now are being saved in /etc/NetworkManager/system-connections/. I don't know how to migrate my settings to the new config file format Can anybody help me? jorge@thinky:~$ sudo lshw -C network *-network description: Ethernet interface product: 82566MM Gigabit Network Connection vendor: Intel Corporation physical id: 19 bus info: pci@0000:00:19.0 logical name: eth0 version: 03 serial: 00:1f:e2:14:5a:9b capacity: 1Gbit/s width: 32 bits clock: 33MHz capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=1.5.1-k firmware=0.3-0 latency=0 link=no multicast=yes port=twisted pair resources: irq:46 memory:fe000000-fe01ffff memory:fe025000-fe025fff ioport:1840(size=32) *-network description: Wireless interface product: PRO/Wireless 4965 AG or AGN [Kedron] Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 61 serial: 00:21:5c:32:c2:e5 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwl4965 driverversion=3.2.0-23-generic-pae firmware=228.61.2.24 ip=192.168.2.103 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn resources: irq:47 memory:df3fe000-df3fffff jorge@thinky:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise jorge@thinky:~$ uname -a Linux thinky 3.2.0-23-generic-pae #36-Ubuntu SMP Tue Apr 10 22:19:09 UTC 2012 i686 i686 i386 GNU/Linux jorge@thinky:~$ dpkg -l | grep -i firm ii linux-firmware 1.79 Firmware for Linux kernel drivers

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