Wireless packet loss on Atheros AR5212

Bug #698055 reported by Alexander Makarov on 2011-01-06
This bug affects 2 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

I have a Lenovo Thinkpad T60 with Atheros AR5212 wi-fi adapter. When it is connected by wifi, it loose packets exactly every 2 minutes (120 seconds). Packet loss is about 2-4%. When I connect ethernet, no packets are lost. Another laptop (dell) in same wifi network do not loose packets as well.
Problem affects skype, every 2 minutes remote person can not hear me for a few seconds, while I hear him perfectly.
Attaching a log pinging my local router.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-24-generic 2.6.35-24.42
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic
Uname: Linux 2.6.35-24-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
 /dev/snd/controlC0: deltaflight 1396 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
 Card hw:0 'Intel'/'HDA Intel at 0xee400000 irq 47'
   Mixer name : 'Analog Devices AD1981'
   Components : 'HDA:11d41981,17aa2025,00100200'
   Controls : 20
   Simple ctrls : 11
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 79HT50WW-1.07'
   Mixer name : 'ThinkPad EC 79HT50WW-1.07'
   Components : ''
   Controls : 2
   Simple ctrls : 1
 Simple mixer control 'Console',0
   Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
   Playback channels: Mono
   Limits: Playback 0 - 14
   Mono: Playback 4 [29%] [on]
Date: Thu Jan 6 13:43:50 2011
HibernationDevice: RESUME=UUID=95cbb919-b28a-4557-ae5c-e9895103aabb
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: LENOVO 2007WX9
 Socket 0:
   no product info available
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-24-generic root=UUID=17fbb679-d250-40f0-8fac-8b594b4e1392 ro quiet splash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 04/12/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ETD2WW (2.12 )
dmi.board.name: 2007WX9
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr79ETD2WW(2.12):bd04/12/2007:svnLENOVO:pn2007WX9:pvrThinkPadT60:rvnLENOVO:rn2007WX9:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2007WX9
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO

Jeremy Foshee (jeremyfoshee) wrote :

Hi Alexander,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

tags: added: kj-triage
Changed in linux (Ubuntu):
status: New → Incomplete

 Tested with v2.6.37-rc2-maverick and 2.6.37-natty kernels, with same result.

tags: removed: needs-upstream-testing
Launchpad Janitor (janitor) wrote :

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

Changed in linux (Ubuntu):
status: Incomplete → Expired
Bernard_Ivo (bernard-abv) wrote :

Hei, I can confirm I'm experiencing similar issue. I have Lenovo T61, Atheros ethernet device. Trough wi-fi sending packet loss goes up to 50%/333% and even higher every two minutes for about 10-15 seconds. I haven't performed any debugging. So can you point me what should I do to provide you with more valuable info about the problem.

Ubuntu 10.04 LTS - 2.6.32-38-generic

The problem seems for me to be fixed, I can not reproduce it in Oneiric with kernel.

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