TP-Link5008 Atheros AR5416 - ath9k breaks down under many connections

[Sasa Paporovic]

I am on Ubuntu 12.04 64bit updated to 14.4.2012.

With the kernel 3.2.x series ath9k driver got many additional stability, but it is just not enough.

Under many connections the bandwidh of my wireless connection breaks down <12bytes from 700kbit at maximum.

This is nearly a collaps of the wireless connection and should not be.

Reproducing:

1.Go to http://software.opensuse.org/121/de and choose the torrent download option for the openSUSE dvd.
2.Start the torrent with transmission.
3.See your bandthwidh going down with increasing numbers of torrent peer connections.(no neccessary datatransfer - only connection establishing).

The hardware I use is TP-Link5008 - Atheros AR5416

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-generic 3.2.0.23.25
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: user 2554 F.... pulseaudio
 /dev/snd/pcmC0D0p: user 2554 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe7f4000 irq 16'
   Mixer name : 'Realtek ALC889'
   Components : 'HDA:10ec0889,14627596,00100004'
   Controls : 46
   Simple ctrls : 22
Date: Sat Apr 14 14:06:12 2012
HibernationDevice: RESUME=UUID=138839c4-e434-4a2c-8e79-6725810b51e8
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64+mac (20120328)
MachineType: MICRO-STAR INTERNATIONAL CO.,LTD MS-7596
ProcEnviron:
 PATH=(custom, no username)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=00ec9d51-a52f-4879-b208-5bf9136b7e49 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-23-generic N/A
 linux-backports-modules-3.2.0-23-generic N/A
 linux-firmware 1.79
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.8
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 760GM -E51 (MS-7596)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.8:bd09/03/2010:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7596:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rn760GM-E51(MS-7596):rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
dmi.product.name: MS-7596
dmi.product.version: 1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD

[penalvch (penalvch)]

melchiaros, thank you for reporting this and helping make Ubuntu better. 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.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.

Please let us know your results. Thanks in advance.

[penalvch (penalvch)]

melchiaros, thank you for testing the mainline kernel. Which kernel(s) did you test specifically?

[Sasa Paporovic (melchiaros)]

Sorry, Christopher but this here seems to be an misunderstanding.

I have added kernel-unable-to-test-upstram.

This here was reported on Ubuntu 3.2.0-23.36-generic 3.2.14

[penalvch (penalvch)]

melchiaros, no misunderstanding has occurred. We would need to know which upstream kernels you attempted to test, and the results of this. If you just did not test any kernels, then adding the tag "kernel-unable-to-test-upstream" does not apply. Thanks!

[Launchpad Janitor (janitor)]

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