Bug 42658
Summary: | [iwl3945] Unusably slow wifi after resume from suspend | ||
---|---|---|---|
Product: | Drivers | Reporter: | iwl3945 |
Component: | network-wireless | Assignee: | Stanislaw Gruszka (stf_xl) |
Status: | CLOSED INVALID | ||
Severity: | normal | CC: | stf_xl |
Priority: | P1 | ||
Hardware: | All | ||
OS: | Linux | ||
Kernel Version: | 3.0.15 | Subsystem: | |
Regression: | No | Bisected commit-id: | |
Attachments: | Debug kernel log |
Description
iwl3945
2012-01-26 08:29:21 UTC
Created attachment 72196 [details]
Debug kernel log
Looking at logs (this will take some time) ... I did not found anything in logs except that LED command, that we already tested (in private emails). There is similar report: http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2143 Is indicated there that tose are pci subsystem problems, noapic kernel boot option can help with that bug or removing/rescaning pci after resume: http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2143#c44 (I think remove/restore via sysfs should be enough, no module reload needed, see lspci output to find proper bus number) Does those workarounds help for you as well? Hi Stanislaw, Thank you for getting back to me. Unfortunately the described workarounds had no effect, whatsoever, on my issue. With noapic the wifi was slow as before after a suspend. The same with removing / rescanning the pci device after a suspend. I suspect this is an entirely different kind of issue. I think I'll wait till the next ubuntu release and try its live CD to boot from. If the issue will persist, then it's definitely the kernel (or drivers for my HW) and not my specific linux SW setup/apps. Today I downloaded the Ubuntu 12.04 beta ISO. Put in on a USB stick and tested. Unfortunately, the behaviour is exactly the same as with my current linux installation. After resume the WIFI is unusable, and the sound stutters. This issue is still bugging me. Can anyone move this issue to the right team (probably PM-related)? All right folks. Today I was able to find the problem and a workaround. Running on Ubuntu 12.04, kernel 3.2.0.26 To anyone, who's seeing WIFI Driver Queue stuck messages in the syslog after a suspend/resume, I found that a simple logoff-login solves the problem. This also solves the sound stuttering issue after a resume. After several attempts I pinpointed compiz being the culprit. By killing and restarting compiz after suspend/resume, all the problems described are solved. The following issue in launchpad might be the one I am experiencing: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/887993 So the kernel and iwlan3945 drivers are good. Actually, since kernel 3.2.25 it seems the wifi driver is much faster (instead of 24Mb/s now I reach 27Mb/s). Anyway, this bug report can be closed. Great, thanks for the info! |