[alsa-devel] hda-intel channels hibernate bug

Johannes Berg johannes at sipsolutions.net
Wed Apr 15 17:42:31 CEST 2009

On Wed, 2009-04-15 at 17:37 +0200, Takashi Iwai wrote:

> > Sorry... Well, I can't seem to record at all right now for some reason,
> > but here are a few things that are wrong:
> >  1) master mute has no effect (I think that actually worked before?)
> Do you mean that it has no effect on the playback volumes, or on the
> recording level?  The former is a bug, the latter not.
> >  2) the "Speaker" control has no effect (mute/unmute)
> Ditto.

Sorry -- playback on both points.

> >  3) need to set channel control to 6 to get sound at all
> So the pin setup used there don't match with the actual environment,
> apparently...


> >  4) speaker volume is line-out * pcm * master
> >  5) cannot automatically detect codec, need to load with model=mbp3
> What happens exactly, if you load the module without model option?
> Note that "Unknown xxx" message is no error but an informational one.

It says
[ 1319.570055] hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...

but then with the controls I get I cannot make it play any sound.

> > And the last time I could record sound it was all choppy and sounded
> > clipped.
> This might have been improved in the recent version.

Ok, I'll try harder to record something.

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