[alsa-devel] [2.6.33-rc1] [SOUND] HDA: high cpu usage, noise
tiwai at suse.de
Tue Dec 22 10:17:25 CET 2009
At Tue, 22 Dec 2009 10:15:20 +0100,
Éric Piel wrote:
> Op 22-12-09 08:04, Takashi Iwai schreef:
> > At Mon, 21 Dec 2009 20:08:34 +0100,
> > Éric Piel wrote:
> >> Could it be coming from this timeout?
> > It shouldn't. The polling mode doesn't give any behavioral change,
> > and the CPU usage can't be that high.
> > Try is to pass bdl_pos_adj=0 option. This should reduce the CPU hog,
> > at least. But it doesn't mean it's the right fix...
> I'll try
> > Another thing to try is to replace the whole HD-audio stack with the
> > last working one (was it 2.6.32?), and check whether it works with
> > 2.6.32 core.
> Could you give more details on how to do this?
> Does it consist in taking the sound/ directory of 2.6.32 and copying it
> over 2.6.33-rc1 ? Or less files?
I'd try first only sound/pci/hda/* files.
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