Ubuntu
linux package

  1. Bug #564376
  2. Comment #30

Comment 30 for bug 564376

Revision history for this message
Øyvind Stegard (oyvindstegard) wrote : Re: Lucid - iwl3945 drops connection on youtube but not with mainline

Yes, exactly my thought too, Stejarel. I'm running Lucid with radeon-KMS on ATI X1400 mobile graphics card (Lenovo Z61m laptop), and not only iwl3945 seems badly affected by graphical operations, but so does snd-hda-intel.

1) Youtube (or Flash in general) fullscreeen => iwl3945 very often drops the wireless connection during streaming (usually accompanied by some timeout errors in log, and sometimes even hpet "increasing min_delta_ns" warnings).
2) Fullscreen video or Flash => pops/crackles in audio, even though system is *not* overloaded (and this is *not* caused by Pulseaudio or HDA power management).
3) Running neverball under KMS actually causes dropped wireless connection, it seems (this happened with 2.6.34-rc7)..

I've been investigating audio issues under KMS for many days since I installed Lucid, since I have problems with crackling noise during video playback. Radeon KMS somehow causes problems with snd-hda-intel interrupt handling (been at it in bug 15912 at bugzilla.kernel.org, for a few days now).

Tried 2.6.34-rc7 (compiled myself from mainline, but using Ubuntu packaging and config), and after getting some other audio issue fixed (in same kernel bug metioned above), the pops/clicks and wireless problems sadly remain when using KMS.

Disabling radeon KMS definitely causes all audio problems to vanish, but I have not verified if it also cures the wireless problem with iwl3945.