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• Cannot connect to secure wireless with Netgear wna3100 USB

  - by Vince Radice

  I have installed Ubuntu 11.10. I used a wired connection to download and install all of the updates. When I tried to use a Netgear WNA3100 wireless USB network adapter, it failed. Much searching and trying things I was finally able to get it working by disabling security on my router. I have verified this by disabling security and I was able to connect. When I enabled security (WPA2 PSK), the connection failed. What is necessary to enable security (WPA2 PSK) and still use the Netgear USB interface? Here is the output from the commands most requested lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 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 001 Device 003: ID 0846:9020 NetGear, Inc. WNA3100(v1) Wireless-N 300 [Broadcom BCM43231] lshw -C network *-network description: Ethernet interface product: RTL-8139/8139C/8139C+ vendor: Realtek Semiconductor Co., Ltd. physical id: 3 bus info: pci@0000:02:03.0 logical name: eth0 version: 10 serial: 00:40:ca:44:e6:3e size: 10Mbit/s capacity: 100Mbit/s width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=8139too driverversion=0.9.28 duplex=half latency=32 link=no maxlatency=64 mingnt=32 multicast=yes port=MII speed=10Mbit/s resources: irq:19 ioport:c800(size=256) memory:ee011000-ee0110ff memory:40000000-4000ffff *-network description: Wireless interface physical id: 1 logical name: wlan0 serial: e0:91:f5:56:e1:0d capabilities: ethernet physical wireless configuration: broadcast=yes driver=ndiswrapper+bcmn43xx32 driverversion=1.56+,08/26/2009, 5.10.79.30 ip=192.168.1.104 link=yes multicast=yes wireless=IEEE 802.11g iwconfig lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11g ESSID:"vincecarolradice" Mode:Managed Frequency:2.422 GHz Access Point: A0:21:B7:9F:E5:EE Bit Rate=121.5 Mb/s Tx-Power:32 dBm RTS thr:2347 B Fragment thr:2346 B Encryption key:off Power Management:off Link Quality:76/100 Signal level:-47 dBm Noise level:-96 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 ndiswrapper -l bcmn43xx32 : driver installed device (0846:9020) present lsmod | grep ndis ndiswrapper 193669 0 dmesg | grep -e ndis -e wlan [ 907.466392] ndiswrapper version 1.56 loaded (smp=yes, preempt=no) [ 907.838507] ndiswrapper (import:233): unknown symbol: ntoskrnl.exe:'IoUnregisterPlugPlayNotification' [ 907.838955] ndiswrapper: driver bcmwlhigh5 (Netgear,11/05/2009, 5.60.180.11) loaded [ 908.137940] wlan0: ethernet device e0:91:f5:56:e1:0d using NDIS driver: bcmwlhigh5, version: 0x53cb40b, NDIS version: 0x501, vendor: 'NDIS Network Adapter', 0846:9020.F.conf [ 908.141879] wlan0: encryption modes supported: WEP; TKIP with WPA, WPA2, WPA2PSK; AES/CCMP with WPA, WPA2, WPA2PSK [ 908.143048] usbcore: registered new interface driver ndiswrapper [ 908.178826] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 994.015088] usbcore: deregistering interface driver ndiswrapper [ 994.028892] ndiswrapper: device wlan0 removed [ 994.080558] ndiswrapper version 1.56 loaded (smp=yes, preempt=no) [ 994.374929] ndiswrapper: driver bcmn43xx32 (,08/26/2009, 5.10.79.30) loaded [ 994.404366] ndiswrapper (mp_init:219): couldn't initialize device: C0000001 [ 994.404384] ndiswrapper (pnp_start_device:435): Windows driver couldn't initialize the device (C0000001) [ 994.404666] ndiswrapper (mp_halt:262): device e05b6480 is not initialized - not halting [ 994.404671] ndiswrapper: device eth%d removed [ 994.404709] ndiswrapper: probe of 1-5:1.0 failed with error -22 [ 994.406318] usbcore: registered new interface driver ndiswrapper [ 2302.058692] wlan0: ethernet device e0:91:f5:56:e1:0d using NDIS driver: bcmn43xx32, version: 0x50a4f1e, NDIS version: 0x501, vendor: 'NDIS Network Adapter', 0846:9020.F.conf [ 2302.060882] wlan0: encryption modes supported: WEP; TKIP with WPA, WPA2, WPA2PSK; AES/CCMP with WPA, WPA2, WPA2PSK [ 2302.113838] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 2354.611318] ndiswrapper (iw_set_auth:1602): invalid cmd 12 [ 2355.268902] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 2365.400023] wlan0: no IPv6 routers present [ 2779.226096] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 2779.422343] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 2797.574474] ndiswrapper (iw_set_auth:1602): invalid cmd 12 [ 2802.607937] ndiswrapper (iw_set_auth:1602): invalid cmd 12 [ 2803.261315] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 2813.952028] wlan0: no IPv6 routers present [ 3135.738431] ndiswrapper (iw_set_auth:1602): invalid cmd 12 [ 3139.180963] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3139.816561] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3163.229872] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3163.444542] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3163.758297] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3163.860684] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3205.118732] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3205.139553] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3205.300542] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3353.341402] ndiswrapper (iw_set_auth:1602): invalid cmd 12 [ 3363.266399] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3363.505475] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3363.506619] ndiswrapper (set_iw_auth_mode:601): setting auth mode to 5 failed (00010003) [ 3363.717203] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3363.779206] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3405.206152] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3405.248624] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3405.577664] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3438.852457] ndiswrapper (iw_set_auth:1602): invalid cmd 12 [ 3438.908573] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3568.282995] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3568.325237] ndiswrapper (set_iw_auth_mode:601): setting auth mode to 5 failed (00010003) [ 3568.460716] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3568.461763] ndiswrapper (set_iw_auth_mode:601): setting auth mode to 5 failed (00010003) [ 3568.809776] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3568.880641] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3610.122848] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3610.148328] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3610.324502] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 3636.088798] ndiswrapper (iw_set_auth:1602): invalid cmd 12 [ 3636.712186] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 3647.600040] wlan0: no IPv6 routers present I am using the system now with the router security turned off. When I submit this, I will turn security back on.

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• Wireless not working on Dell XPS 17 after installing 12.04

  - by user60622

  I (linux newbie) have a Dell XPS 17 and tried to install Ubuntu 12.04. After installation all WLAN accesspoints near are detected. But I can not connect (but I am able to connect with other computers as well as with Dell XPS 17 under windows). Outputs: iwconfig lo no wireless extensions. wlan0 IEEE 802.11bg ESSID:"LerchenPoint" Mode:Managed Frequency:2.412 GHz Access Point: 58:6D:8F:A0:2D:58 Bit Rate=1 Mb/s Tx-Power=14 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=70/70 Signal level=-37 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:19 Missed beacon:0 eth0 no wireless extensions. sudo lshw -class network *-network description: Wireless interface product: Centrino Wireless-N 1000 vendor: Intel Corporation physical id: 0 bus info: pci@0000:04:00.0 logical name: wlan0 version: 00 serial: 00:26:c7:99:98:28 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.2.0-24-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bg resources: irq:50 memory:f0400000-f0401fff *-network description: Ethernet interface product: RTL8111/8168B PCI Express Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:0a:00.0 logical name: eth0 version: 06 serial: f0:4d:a2:56:e3:94 size: 1Gbit/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=192.168.0.123 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s resources: irq:47 ioport:6000(size=256) memory:f0a04000-f0a04fff memory:f0a00000-f0a03fff dmesg | grep iwl [ 10.157531] iwlwifi 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 10.157561] iwlwifi 0000:04:00.0: setting latency timer to 64 [ 10.157598] iwlwifi 0000:04:00.0: pci_resource_len = 0x00002000 [ 10.157599] iwlwifi 0000:04:00.0: pci_resource_base = ffffc90011090000 [ 10.157601] iwlwifi 0000:04:00.0: HW Revision ID = 0x0 [ 10.157731] iwlwifi 0000:04:00.0: irq 50 for MSI/MSI-X [ 10.157834] iwlwifi 0000:04:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C [ 10.157976] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 10.179772] iwlwifi 0000:04:00.0: device EEPROM VER=0x15d, CALIB=0x6 [ 10.179775] iwlwifi 0000:04:00.0: Device SKU: 0X50 [ 10.179777] iwlwifi 0000:04:00.0: Valid Tx ant: 0X1, Valid Rx ant: 0X3 [ 10.179796] iwlwifi 0000:04:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels [ 10.574728] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138 [ 10.726409] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs' [ 19.714132] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 19.777862] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 2251.603089] iwlwifi 0000:04:00.0: PCI INT A disabled [ 2266.578350] iwlwifi 0000:04:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 2266.578399] iwlwifi 0000:04:00.0: setting latency timer to 64 [ 2266.578435] iwlwifi 0000:04:00.0: pci_resource_len = 0x00002000 [ 2266.578437] iwlwifi 0000:04:00.0: pci_resource_base = ffffc90011090000 [ 2266.578439] iwlwifi 0000:04:00.0: HW Revision ID = 0x0 [ 2266.578704] iwlwifi 0000:04:00.0: irq 50 for MSI/MSI-X [ 2266.578808] iwlwifi 0000:04:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C [ 2266.578916] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 2266.600709] iwlwifi 0000:04:00.0: device EEPROM VER=0x15d, CALIB=0x6 [ 2266.600712] iwlwifi 0000:04:00.0: Device SKU: 0X50 [ 2266.600713] iwlwifi 0000:04:00.0: Valid Tx ant: 0X1, Valid Rx ant: 0X3 [ 2266.600727] iwlwifi 0000:04:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels [ 2266.605978] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138 [ 2266.606331] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs' [ 2266.614179] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 2266.681541] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S Solutions I tried: rfkill list all 0: dell-wifi: Wireless LAN Soft blocked: no Hard blocked: no 2: phy0: Wireless LAN Soft blocked: no Hard blocked: no echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf options iwlwifi 11n_disable=1 sudo modprobe -rfv iwlwifi WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be ignored in a future release. rmmod /lib/modules/3.2.0-24-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko rmmod /lib/modules/3.2.0-24-generic/kernel/net/mac80211/mac80211.ko rmmod /lib/modules/3.2.0-24-generic/kernel/net/wireless/cfg80211.ko sudo modprobe iwlwifi WARNING: All config files need .conf: /etc/modprobe.d/blacklist, it will be ignored in a future release. replacing iwlwifi-1000-5.ucode (current driver) against iwlwifi-1000-3.ucode sudo jockey-gtk: (jockey-gtk:2493): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion icon_set != NULL' failed (jockey-gtk:2493): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion icon_set != NULL' failed nothing is listet in "Additional drivers" (german: "Zusätzliche Treiber"). gksudo gedit /etc/modprobe.d/blacklist.conf add "blacklist acer_wmi" Any help would be appreciated very much. Thanks!!

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• How to improve wireless network speed?

  - by Toby

  I am running 10.04 LTS on a desktop PC with a Belkin G-Plus MIMO Wireless network card. Ever since running Ubuntu on the machine I have noticed fairly slow network speeds (about half the speed I get when running the same card through Windows) I did some research I found out that by and large wireless network cards aren't that well supported on most Linux distros. I was wondering though if there is anything I could be tweaking on the system that could help squeeze a little more out of the card? Here is some more information *-network:1 description: Wireless interface physical id: 2 logical name: wlan0 serial: 00:1c:df:24:5e:54 capabilities: ethernet physical wireless configuration: broadcast=yes ip=192.168.1.5 multicast=yes wireless=IEEE 802.11bg

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• Should integer divide by zero halt execution?

  - by Pyrolistical

  I know that modern languages handle integer divide by zero as an error just like the hardware does, but what if we could design a whole new language? Ignoring existing hardware, what should a programming language does when an integer divide by zero occurs? Should it return a NaN of type integer? Or should it mirror IEEE 754 float and return +/- Infinity? Or is the existing design choice correct, and an error should be thrown? Is there a language that handles integer divide by zero nicely? EDIT When I said ignore existing hardware, I mean don't assume integer is represented as 32 bits, it can be represented in anyway you can to imagine.

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• Are these interview questions too complex for entry-level C++ positions?

  - by Banana

  Hi All, I recently had a few interviews for programming jobs within the financial industry. I am looking for entry-level positions as I specify in the cover letter. However I am usually asked questions such as: - all two-letters commands you know in unix - representation of float/double numbers (ieee standard) - segmentation fault memory dump, and related issues - all functions you know to convert string to integer (not just atoi) - how to avoid virtual tables - etc.. Is that the custom? Because I don't think this kind of questions make sense for someone willing to get an entry-level job. Is it totally crazy to think that they should ask more conceptual questions? This is beginning to driving me nuts, honestly. Thanks

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• Who is likely to need the most this high-quality, measurable, reliable approach to software? [closed]

  - by Marek Cruz

  Software engineering is the application of principles of engineering to software. Trouble is, most of those who like to flatter with the title "software engineer" don't do that. They just keep writing code and patching it until it's stable enough to foist off on users. That's not software engineering. Who is likely to need the most the practice of software engineering? (with all the project planning, requirements engineering, software design, implementation based on the design, testing, deployment, awareness of IEEE standards, metrics, security, dependability, usability, etc.)

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• My wireless is hard-blocked

  - by Cristian

  I'm new to linux and i am having trouble getting my wireless to work I've found the following things Wireless LAN Soft blocked: no Hard blocked: yes and : *-network DISABLED description: Wireless interface product: RT3090 Wireless 802.11n 1T/1R PCIe vendor: Ralink corp. physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 00 serial: 6c:62:6d:19:38:b9 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rt2800pci driverversion=3.2.0-25-generic-pae firmware=0.34 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:16 memory:fdfe0000-fdfefff Can you please tell me what to do?

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• Can't connect to WIFI after sleep Ubuntu 14.04

  - by user3380404

  After an upgrade over a previous version to Ubuntu 14.04 I have problems with connecting to WiFi. After suspending it won't reconnect to any existing network unless I restart the laptop. sudo lshw -C network: *-network description: Ethernet interface product: 82567LM Gigabit Network Connection vendor: Intel Corporation physical id: 19 bus info: pci@0000:00:19.0 logical name: eth0 version: 03 serial: 00:27:13:b4:d3:58 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=2.3.2-k firmware=1.8-3 latency=0 link=no multicast=yes port=twisted pair resources: irq:45 memory:fc200000-fc21ffff memory:fc225000-fc225fff ioport:1840(size=32) *-network description: Wireless interface product: PRO/Wireless 5100 AGN [Shiloh] Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 00 serial: 00:26:c6:c6:6b:c8 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-29-generic firmware=8.83.5.1 build 33692 ip=10.0.1.160 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn resources: irq:48 memory:f4200000-f4201fff

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• Computer Arithmetic - Binary for Decimal Numbers

  - by MarkPearl

  This may be of use to someone else doing this course… The Problem In the section on Computer Arithmetic it gives an example of converting -7.6875 to IEEE floating point format. I understand all the steps except for the first one, where it does the following... 7.6875 (base 10) = 111.1011 (base 2) I don't understand the conversion - I realize that 111 (base 2) = 7 (base 10), but how does the .6875 part relate to the .1011? Or am I totally off track with this? The Solution The fractional part of the decimal to binary conversion is done as follows: 0.6875 x 2 = 1.375 = 0.375 + 1 (Keep the 1 separate) 0.375 x 2   = 0.75   = 0.75    + 0 0.75 x 2    = 1.5      = 0.5      + 1 0.5 x 2     = 1.0       = 0.0       + 1 The bit pattern of 0s and 1s on the right-hand side gives you the fractional part. So 0.6875 (base 10) = .1011 (Base 2) See also Stallings, chapter 19.

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• Asus X552VL WI-FI Problem

  - by Mitkobg

  I have a problem with my Wireless on my laptop. When i did rfkill list: 1: asus-wlan: Wireless LAN Soft blocked: no Hard blocked: no 2: asus-bluetooth: Bluetooth Soft blocked: no Hard blocked: no 4: hci0: Bluetooth Soft blocked: no Hard blocked: no 5: phy1: Wireless LAN Soft blocked: no Hard blocked: yes itko@Mitko:~$ iwconfig eth0 no wireless extensions. lo 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 mitko@Mitko:~$ lspci -nnk | grep -A2 0280 03:00.0 Network controller [0280]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01) Subsystem: AzureWave Device [1a3b:2c97] Kernel driver in use: ath9k mitko@Mitko:~$ lsmod | grep -e ath9k -e asus asus_nb_wmi 16990 0 asus_wmi 24191 1 asus_nb_wmi sparse_keymap 13948 1 asus_wmi ath9k 164164 0 ath9k_common 13551 1 ath9k ath9k_hw 453856 2 ath9k_common,ath9k ath 28698 3 ath9k_common,ath9k,ath9k_hw mac80211 626557 1 ath9k cfg80211 484040 4 wl,ath,ath9k,mac80211 wmi 19177 3 mxm_wmi,nouveau,asus_wmi video 19476 3 i915,nouveau,asus_wmi

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• Software development magazines [closed]

  - by Sebastian

  Ive spent the last hour or so browsing the web for professional development magazines. I am mostly interested in the java platform, agile methods, "programming in general" (tutorials on languages or whatever, "hot new stuff" etc) and software craftmanship. My best finding yet was pragpub and maybe MSDN magazine. I am willing to pay and have a Zinio account if anyone knows a magazine about programming that is distributed by them. Ive already browsed a couple of related threads here on stackexchange. ACM and IEEE does not seem relevant, as Im not interested in research articles. Maybe conferences like OOPSLA as somebody mentioned in another thread. PS. I prefer if they are in pdf or readable on kindle or a tablet. DS. BR Sebastian

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• Has anyone done CSDP certification?

  - by DPD

  I was looking at some certifications that can potentially enhance my knowledge and market value as a Software Engineer. IEEE's Certified Software Development Professional (CSDP) caught my attention. When I looked on the net for any user experiences with it I couldn't find anything substantial. Doesn't seem too popular. And I certainly havent heard of anyone in my organization or friends circle who have done it. I would like to know from community members if anyone has done this certification and their experiences with the same. Was the certification useful in terms of knowledge. Did it add weight to your resume (not deadweight!)?

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• Intel Centrino Wireless-N 1000 Again ! Ubuntu 13.04 x64

  - by vafa

  First I have to say that I tried everything written about this concept. The problem is that it stops working randomly in 3 main forms : 1 - sometimes it disconnect from wireless network and reconnect automatically 2 - sometimes it disconnect and wont connect no matter what (needs reboot) 3 - some times it's still connected but cannot ping or surf or whatever. I already tried disabling N mod using these commands : sudo modprobe -r iwlwifi modprobe iwlwifi 11n_disable=1 (or 0, whatever) it didn't help . these are the results of lspci, sudo lshw -C network, ifconfig, iwconfig, rfkill list when it disconnected and didn't connect till reboot : ifconfig : eth0 Link encap:Ethernet HWaddr c8:0a:a9:34:65:77 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:1563213476557380 errors:9379306629148050 dropped:3126435543049350 overruns:1563217771524675 frame:7816088857623375 TX packets:1563217771524675 errors:6252871086098700 dropped:0 overruns:1563217771524675 carrier:3126435543049350 collisions:7816088857623375 txqueuelen:1000 RX bytes:1563217771524675 (1.5 PB) TX bytes:1563217771524675 (1.5 PB) ham0 Link encap:Ethernet HWaddr 7a:79:19:a5:e4:93 inet addr:25.165.228.147 Bcast:25.255.255.255 Mask:255.0.0.0 inet6 addr: fe80::7879:19ff:fea5:e493/64 Scope:Link inet6 addr: 2620:9b::19a5:e493/96 Scope:Global UP BROADCAST RUNNING MULTICAST MTU:1404 Metric:1 RX packets:7743 errors:0 dropped:0 overruns:0 frame:0 TX packets:1250 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:665642 (665.6 KB) TX bytes:204056 (204.0 KB) 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:65536 Metric:1 RX packets:41138 errors:0 dropped:0 overruns:0 frame:0 TX packets:41138 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:6420962 (6.4 MB) TX bytes:6420962 (6.4 MB) wlan0 Link encap:Ethernet HWaddr 00:1e:64:45:fb:70 inet6 addr: fe80::21e:64ff:fe45:fb70/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:286999 errors:0 dropped:0 overruns:0 frame:0 TX packets:226966 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:324386887 (324.3 MB) TX bytes:30674804 (30.6 MB) iwconfig : ham0 no wireless extensions. eth0 no wireless extensions. lo no wireless extensions. wlan0 IEEE 802.11bg ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=14 dBm 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 [Condor Peak] vendor: Intel Corporation physical id: 0 bus info: pci@0000:07:00.0 logical name: wlan0 version: 00 serial: 00:1e:64:45:fb:70 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=3.8.0-30-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bg resources: irq:46 memory:c0400000-c0401fff *-network description: Ethernet interface product: AR8131 Gigabit Ethernet vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:09:00.0 logical name: eth0 version: c0 serial: c8:0a:a9:34:65:77 capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.1-NAPI latency=0 link=no multicast=yes port=twisted pair resources: irq:47 memory:c0900000-c093ffff ioport:5000(size=128) *-network description: Ethernet interface physical id: 2 logical name: ham0 serial: 7a:79:19:a5:e4:93 size: 10Mbit/s capabilities: ethernet physical configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full ip=25.165.228.147 link=yes multicast=yes port=twisted pair speed=10Mbit/s lspci: 00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07) 00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07) 00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03) 00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03) 00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03) 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) 00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03) 00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03) 00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 03) 00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03) 00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03) 00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03) 00:1d.3 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03) 00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93) 00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03) 00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 03) 00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03) 01:00.0 VGA compatible controller: NVIDIA Corporation G98M [GeForce G 105M] (rev a1) 07:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000 [Condor Peak] 09:00.0 Ethernet controller: Qualcomm Atheros AR8131 Gigabit Ethernet (rev c0) rfkill list : 1: acer-wireless: Wireless LAN Soft blocked: no Hard blocked: no 2: acer-bluetooth: Bluetooth Soft blocked: yes Hard blocked: no 9: phy0: Wireless LAN Soft blocked: no Hard blocked: no any help will be REALLLYYYY appreciated

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• slow speed transfering files to a local network device

  - by F. Ariel Jung

  I'm having troubles copying files from my pc(ubuntu 13.04 64 bits) to a Media Center(WDTV Live: with an SATA2 HDD attached) through the local network. the speed is to slow, it's up to 2.0 MB/s image: http://s11.postimg.org/g1nuai92b/Captura_de_pantalla_de_2013_06_24_07_46_55.png (I don't use image tag because it is a big image) my PC has a wifi network card Tp Link TL-WN951N and it is connected to a TP Link TL-WDR3500 router via wifi, and the WDTV Live is connected via LAN here is a iwconfig: eth0 no wireless extensions. lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:"TL-WDR3500" Mode:Managed Frequency:2.462 GHz Access Point: A0:F3:C1:6C:3B:F1 Bit Rate=39 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=62/70 Signal level=-48 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:33521 Invalid misc:2245290 Missed beacon:0 if more data is required I'll post it as needed. I can't figure this out, needed help. please

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• iwconfig usage for WEP access point?

  - by johan elmander

  I would like to use my wifi doggle in my pc (ubuntu 12.04). I am able to connect to my access point through the GUI. I would like to do the same in the terminal. My access point uses WEP. So I typed the following commands iwconfig wlan0 mode managed key 6d6f6e6579 iwconfig wlan0 essid "AccessPoint" dhclient wlan0 after typing dhclient wlan0 it waits like 1-2 min then outputs nothing and cannot connect to the Access Point. iwconfig output: wlan0 IEEE 802.11bgn ESSID:"AccessPoint" Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm Retry long timit:7 RTS thr=2347 B Fragment thr:off Encryption key:6D6F-6E65-79 Power Management:off I would appreciate any suggestion

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• Hostapd to connect laptop to Android

  - by Kmegamind

  i am trying to set up my laptop as an access point for my Android to use WiFi, so i knew that ubuntu sets the network as Ad-Hoc which is not discoverable by android, So i tried the method explained here -which i found on many other websites- but when i run hostapd.conf this error appears : nl80211: Failed to set interface wlan0 into AP mode nl80211 driver initialization failed. ELOOP: remaining socket: sock=4 eloop_data=0x8e488f8 user_data=0x8e48ea0 handler=0x807c5e0 ELOOP: remaining socket: sock=6 eloop_data=0x8e4aca8 user_data=(nil) handler=0x8086770 this is how my hostapd.conf looks like : interface=wlan0 driver=nl80211 ssid=Any_SSID_name hw_mode=g channel=1 macaddr_acl=0 auth_algs=1 ignore_broadcast_ssid=0 wpa=2 wpa_passphrase=Any_password wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP and this is my wireless card info : description: Wireless interface product: BCM43225 802.11b/g/n vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:05:00.0 logical name: wlan0 version: 01 serial: 78:e4:00:73:51:f1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=brcmsmac driverversion=3.2.0-31-generic-pae firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:17 memory:f0300000-f0303fff

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• Wifi problem in ubuntu using macbook pro when it restart

  - by Amro

  I was read that subject : http://ubuntuforums.org/showthread.php?t=2011756 and i follow it step by step in the page n 1 , then i was connect but after i restart my macbook again , i was lost the wifi connection.i dont know why or whats the problem exactly. every time I run this command: dmesg | grep -e b43 -e bcma I get this output: [ 2012.769684] bcma-pci-bridge 0000:02:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 2012.769701] bcma-pci-bridge 0000:02:00.0: setting latency timer to 64 [ 2012.769775] bcma: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x25, class 0x0) [ 2012.769808] bcma: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x1D, class 0x0) [ 2012.769889] bcma: Core 2 found: PCIe (manuf 0x4BF, id 0x820, rev 0x13, class 0x0) [ 2012.770175] bcma: PMU resource config unknown for device 0x4331 [ 2012.824527] bcma: Bus registered [ 2012.831744] b43-phy0: Broadcom 4331 WLAN found (core revision 29) [ 2013.371031] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07) and to get the connection again every time i must entery that code in the step of reload driver. How i can let the ubuntu see my wifi and wireless device automatically when i reboot my computer????

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• Two Wifi Icons in Panel

  - by Alex

  I have the exact problem in 13.10 as this user Two Wifi indicators in panel. Here are some screenshots: Here are some screenshots from another user: http://ubuntuforums.org/showthread.php?t=2183020&p=12825563 ifconfig and iwconfig outputs $ ifconfig lo Link encap:Local Loopback inet addr:XXXXXX Mask:XXXXXXX inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:2243 errors:0 dropped:0 overruns:0 frame:0 TX packets:2243 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:209889 (209.8 KB) TX bytes:209889 (209.8 KB) wlan0 Link encap:Ethernet HWaddr XXXXXXXXX inet addr:XXXXXX Bcast:XXXXXXXX Mask:XXXXXXX inet6 addr: XXXXXXX Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5925 errors:0 dropped:0 overruns:0 frame:0 TX packets:3361 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2951818 (2.9 MB) TX bytes:630579 (630.5 KB) $ iwconfig lo no wireless extensions. wlan0 IEEE 802.11abgn ESSID:"XXXXX" Mode:Managed Frequency:2.437 GHz Access Point: XXXXXXXX Bit Rate=72.2 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:on Link Quality=49/70 Signal level=-61 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:153 Invalid misc:472 Missed beacon:0

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• WIFI card intel r 2200 will not work

  - by Telemarkhero

  I have installed 12.04 on a Fujitsu Siemens Amilo Pro. Wifi card does not work. Have tried various threads but none have the same problem. Think I have the correct firmware but the following comes up: gill@ubuntu:~$ iwconfig lo no wireless extensions. eth1 IEEE 802.11bg ESSID:off/any Mode:Managed Channel:0 Access Point: Not-Associated Bit Rate:0 kb/s Tx-Power=off Sensitivity=8/0 Retry limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 eth0 no wireless extensions. Also gill@ubuntu:~$ rfkill list all 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes There is a power switch for wifi but it does not do anything in Ubuntu. Any pointers greatfully received.

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• How can a Cisco Aironet wireless card connect to a WPA encrypted network?

  - by Aibara Iduas

  I have a Thinkpad T40 running Ubuntu 10.10. I want to connect to wireless networks with WPA encryption; they appear in the network list, but are grayed out. The card does support WPA, since it works in Windows. In 10.10 the wireless works just fine with unprotected and WEP networks, but cannot connect to any WPA networks. The card is a Cisco Aironet Wireless 802.11b. I've been reading a lot of forum posts trying to find a solution, but either encounter threads where no solution was found or answers longer apply (most date from 2007, since this isn't the newest of computers). Here is the output of sudo lshw -c network: *-network:1 DISABLED description: Wireless Interface product: Cisco Aironet Wireless 802.11b vendor: AIRONET Wireless Communications physical id: 2 bus info: pci@000:02:02.0 logical name: eth1 version: 00 serial: 00:02:8a:78:6a:44 width: 32 bits clock: 33MHz capabilities: pm vpd bus_master cap_list rom ethernet physical wireless logical configuration: broadcast=yes driver=airo latency=64 maxlatency=4 mingnt=4 multicast=yes wireless=IEEE 802.11-DS Thanks, any help would be greatly appreciated!

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• How to camel-case where consecutive words have numbers?

  - by Rob I

  Just wondering if anybody has a good convention to follow in this corner-corner-corner case. I really use Java but figured the C# folks might have some good insight too. Say I am trying to name a class where two consecutive words in the class name are numeric (note that the same question could asked about identifier names). Can't get a great example, but think of something like "IEEE 802 16 bit value". Combining consecutive acronyms is doable if you accept classnames such as HttpUrlConnection. But it seriously makes me throw up a little to think of naming the class IEEE80216BitValue. If I had to pick, I'd say that's even worse than IEEE802_16BitValue which looks like a bad mistake. For small numbers, I'd consider IEEE802SixteenBitValue but that doesn't scale that well. Anyone out there have a convention? Seems like Microsoft's naming guidelines are the only ones that describe acronym naming in enough detail to get the job done, but nobody has addressed numbers in classnames.

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• Advice Required Regarding Creating a Self Learning, Self Organizing Programming Team....

  - by tGilani

  Hello I'm a senior student at my university and chairperson of IEEE Student Branch there. Recently I was thinking of some idea to acquaint students with the professional environment, how software is produced in the industry and get a practical experience.. Obviously trips to software houses are not enough and we cannot provide this many internships. So the idea of simulating a software house within the university popped in. Resources at my disposal are students with their own laptops, university UPS and lan network with internet access, and a reasonably sized room with a whiteboard and three hours free time daily.. :) However, I have absolutely no idea where to begin with. Milestones or whatever it may be called, are Requirements Document generation, sharing of resources, delegation of tasks, version controlling etc... I'd really appreciate some advice, programming tools (for JAVA), communication tools etc and other things used in a decent software house... Technologies to be targeted shall be random possibly starting with J2EE Spring Hibernate and Later Visual Programming in .NET C# and ASP.NET MVC as well as Android or iPhone development....

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• How to fix slow wireless with Intel 4965 AGN? [closed]

  - by mikewhatever

  Possible Duplicate: Slow wireless with an Intel 4965 We run Ubuntu 12.04, 32bit, with the current kernel 3.2.27-generic on an MSI EX700. I've already added the 11n_disable=1 tweek, without whcih, wireless has been unusable. Now, it works OK, but speedtest shows: Windows XP - down 11.68mbps, up 2.07mbps Ubuntu 12.04 - down 2.06mbps up 2.0mbps We've disabled ipv6, tried static and dinamic IPs, tried both swcrypto=0 and swcrypto=1 options, none of whcih made any difference. The problem may be the symptom of high packet loss. For example, here's the output of iwconfig after booting and testing the speeds: wlan0 IEEE 802.11abg ESSID:"amu" Mode:Managed Frequency:2.462 GHz Access Point: 00:78:9E:FA:32:C8 Bit Rate=54 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=58/70 Signal level=-52 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:11 Invalid misc:3627 Missed beacon:0 I've posted a help request before with lots of technical info and outputs.

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• How to Install Linux on my PC

  - by Holic

  Hi i need some help to install the drivers from my pc, on Ubuntu 10.10 i just installed it, and i a newbie on Ubuntu, but i understand a bit of Windows...but i want to try ubuntu and then Maybe change to UBUNTU!!! My hardware: QuadCore Intel Core i7-870, 3266 MHz (24 x 136) Asus P7P55D-E (2 PCI, 3 PCI-E x1, 2 PCI-E x16, 4 DDR3 DIMM, Audio, Gigabit LAN, IEEE-1394) NVIDIA GeForce GTX 480 (1536 MB) nVIDIA HDMI @ nVIDIA GF100 - High Definition Audio Controller VIA VT1828S @ Intel Ibex Peak PCH - High Definition Audio Controller [B-3] DIMM1: G Skill F3-12800CL9-2GBRL 2 GB DDR3-1333 DDR3 SDRAM (8-8-8-22 @ 609 MHz) (7-7-7-20 @ 533 MHz) (6-6-6-17 @ 457 MHz) DIMM3: G Skill F3-12800CL9-2GBRL 2 GB DDR3-1333 DDR3 SDRAM (8-8-8-22 @ 609 MHz) (7-7-7-20 @ 533 MHz) (6-6-6-17 @ 457 MHz) my pc is not connected to the internet with a wire(RJ45) but with a wireless LAn Asus WL-167G-V3(wich i also whant to install if possible) Anything would've help me :) Cheers & Thank you!

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• Wireless problems on HP

  - by Sat93

  I'm not able to enable Wireless using the hardware switch on my HP ProBook4430s. Because of this the Enable Wireless option is greyd out and I cannot enable it. The greyd out option can be seen in the screenshot below. The results of iwconfig for my system are as follows, lo 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 eth0 no wireless extensions. Also I tried to do the following, sudo ifconfig wlan0 up but I got an error as below, SIOCSIFFLAGS: Operation not possible due to RF-kill Also the result of sudo rfkill list all for my system is as follows, 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes 1: hp-wifi: Wireless LAN Soft blocked: no Hard blocked: no 2: hp-bluetooth: Bluetooth Soft blocked: no Hard blocked: no 3: hci0: Bluetooth Soft blocked: no Hard blocked: no How do I fix this problem? Thanku!

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