[Bug 565892] [NEW] ath5k driver (AR2413): dropped packets, high latency

[scomar]

Public bug reported:

Using the ath5k driver (AR2413 chip) on the lucid kernel I get high
latencies and dropped packets. eg. Web pages load slowly if at all. I
believe it is related to this bug in fedora:
https://bugzilla.redhat.com/show_bug.cgi?id=506372

I tried installing linux-backports-modules-wireless-lucid-generic
(linux-backports-modules-wireless-2.6.32-21-generic at the time of this
report) and also tried loading ath5k with:

modprobe ath5k nohwcrypt=1
AND
modprobe ath5k nohwcrypt=0

Neither of these had any effect on the problem. However, installing the 2.6.33 kernel from the mainline ppa fixes the problem completely!
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.33/

I will attach the results of pinging my router under both the 2.6.32 and
2.6.33 kernels for proof of the fix.

A backported patch for the lucid kernel would be great! :-)

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-21-generic 2.6.32-21.32
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  scottl     1559 F.... kmix
 /dev/snd/controlC0:  scottl     1559 F.... kmix
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xe9300000 irq 22'
   Mixer name	: 'Realtek ALC889A'
   Components	: 'HDA:10ec0885,1458a002,00100101'
   Controls      : 43
   Simple ctrls  : 24
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xe5010000 irq 17'
   Mixer name	: 'ATI R6xx HDMI'
   Components	: 'HDA:1002aa01,00aa0100,00100100'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [off]
Date: Sun Apr 18 19:11:48 2010
HibernationDevice: RESUME=UUID=3d5ade3c-5b98-4b53-8040-51f5e201bc40
InstallationMedia: Kubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100406)
MachineType: Gigabyte Technology Co., Ltd. EP45-DS3
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=48631c15-5a8c-4695-8ef0-a258637d1b0b ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_AU.UTF-8
 LANGUAGE=
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
dmi.bios.date: 07/23/2008
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F7
dmi.board.name: EP45-DS3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF7:bd07/23/2008:svnGigabyteTechnologyCo.,Ltd.:pnEP45-DS3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnEP45-DS3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: EP45-DS3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid needs-upstream-testing networking

-- 
ath5k driver (AR2413): dropped packets, high latency
https://bugs.launchpad.net/bugs/565892
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