First connection lost and low speed. ~$ uname -a Linux buzz-dee-desktop 3.8.0-030800rc7-generic #201302081635 SMP Fri Feb 8 21:36:17 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
~$ iwconfig wlan1 wlan1 IEEE 802.11bgn Mode:Managed Frequency:2.437 GHz Bit Rate=1 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=28/70 Signal level=-82 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:475 Invalid misc:57 Missed beacon:0 ~$ dmesg | egrep '\<ath\>|ath9k' [ 84.457377] ath: EEPROM regdomain: 0x809c [ 84.457382] ath: EEPROM indicates we should expect a country code [ 84.457384] ath: doing EEPROM country->regdmn map search [ 84.457386] ath: country maps to regdmn code: 0x52 [ 84.457388] ath: Country alpha2 being used: CN [ 84.457389] ath: Regpair used: 0x52 [ 84.503427] ieee80211 phy0: Selected rate control algorithm 'ath9k_rate_control' [ 162.926711] ath: phy0: Failed to stop TX DMA, queues=0x004! ** Description changed: The connection to the wireless network often gets lost and then reconnects. Furthermore the connection to the wireless network is often very slow (1 Mb/s). Sometimes after I have reloaded the ath9k kernel module, I can get a connection to the network and sometimes not. Sometimes I have to reboot the pc, because I can't get a connection, but often I can't get a connection after that. wireless card: TP-Link TL-WN951N (AR5416 / AR5008 / 168c:0023) In these upstream kernel versions the bug is still present: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4.1-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4.6-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.3-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5.4-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc1-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc5-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc6-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc7-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6.1-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6.3-quantal/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6.8-raring/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7-raring/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.7.6-raring/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.8-rc6-raring/ + http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.8-rc7-raring/ I had this problem also with Ubuntu Oneiric Ocelot 11.10 and with Ubuntu Natty Narwhal 11.04, but with Natty the problem was not so bad because it was very rare. Wireless Access Point Manufacturer, Model: FRITZ!Box Fon WLAN 7141 Firmware-Version: 40.04.76 Encryption Type: WPA2 (CCMP) No MAC filtering. Other WiFi devices (Android Phones, Netbooks, Laptop) works with this wireless access point without problems. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-27-generic 3.2.0-27.43 ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21 Uname: Linux 3.2.0-27-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu11 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: buzz-dee 2462 F.... pulseaudio /dev/snd/controlC0: buzz-dee 2462 F.... pulseaudio Card0.Amixer.info: Card hw:0 'VT82xx'/'HDA VIA VT82xx at 0xfbffc000 irq 17' Mixer name : 'Realtek ALC660-VD' Components : 'HDA:10ec0660,1043c603,00100001' Controls : 36 Simple ctrls : 19 Card1.Amixer.info: Card hw:1 'SAA7134'/'saa7133[0] at 0xfbeef800 irq 18' Mixer name : 'SAA7134 Mixer' Components : '' Controls : 6 Simple ctrls : 3 CurrentDmesg: [ 51.480531] vboxdrv: fAsync=1 offMin=0x3600c offMax=0x3600c [ 51.480654] vboxdrv: TSC mode is 'asynchronous', kernel timer mode is 'normal'. [ 51.480656] vboxdrv: Successfully loaded version 4.1.12_Ubuntu (interface 0x00190000). [ 51.525894] vboxpci: IOMMU not found (not registered) [ 52.102129] init: plymouth-stop pre-start process (2156) terminated with status 1 Date: Fri Aug 3 22:12:57 2012 HibernationDevice: RESUME=UUID=7a9c200e-f813-4561-9c36-0d50f5e42f84 InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) MachineType: System manufacturer M2V ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/zsh ProcFB: 0 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-27-generic root=UUID=837266ea-e282-4520-9b4d-8cf22d49c9cd ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-27-generic N/A linux-backports-modules-3.2.0-27-generic N/A linux-firmware 1.79 SourcePackage: linux UpgradeStatus: Upgraded to precise on 2012-06-10 (54 days ago) dmi.bios.date: 02/21/2008 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2101 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: M2V dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2101:bd02/21/2008:svnSystemmanufacturer:pnM2V:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2V:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: M2V dmi.product.version: System Version dmi.sys.vendor: System manufacturer -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1032826 Title: 168c:0023 ath9k wifi slow, and frequently disconnects/reconnects To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1032826/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs