[alsa-devel] 1.0.15: volume levels drift on HDA with STAC92XX codec

[Maxim Levitsky]

On Monday 05 November 2007 13:40:48 Takashi Iwai wrote:
> At Thu, 1 Nov 2007 20:17:30 +0200,
> Maxim Levitsky wrote:
> > 
> > On Thursday 01 November 2007 19:47:39 Chuck Ebbert wrote:
> > > We have two reports now of unstable volume levels:
> > > 
> > > https://bugzilla.redhat.com/show_bug.cgi?id=361051
> > > https://bugzilla.redhat.com/show_bug.cgi?id=354981
> > > 
> > > This is with kernel 2.6.23 plus the two ALSA merge patches from
> > > 2.6.23-rc1.
> > > _______________________________________________
> > > Alsa-devel mailing list
> > > Alsa-devel at alsa-project.org
> > > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> > > 
> > Probably this isn't a software bug.
> > Probably this chip country to datasheet doesn't have usable "Master
>  > Volume" (volume knob) control.
> > 
> > 
> > The master volume control wasn't present before, I added support for
>  > it, using data-sheets. 
> > I need to know what exactly sigmatel codec was used in both cases.
> 
> Yes, the latter case seems with STAC9205 but the former one (361051)
> isn't clear.  Please check /proc/asound/card0/codec#* entries.
> 
> 
> thanks,
> 
> Takashi
> 

The former is also STAC9205/04/ since it is the only one with analog loopback and two ADCs

I have question, I talked with the reporter of 354981, and I don't know why but his amixer
gives very strange results:

[root at itse68482 ~]# cat amixer-contents-kernel-2.6.23.2-36
numid=0,iface=MIXER,name='Master Playback Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=0,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw------,values=2,min=0,max=65536,step=1
  : values=65536,65536
numid=0,iface=MIXER,name='Capture Switch'
  ; type=BOOLEAN,access=rw------,values=1
  : values=on
numid=0,iface=MIXER,name='Capture Volume'
  ; type=INTEGER,access=rw------,values=2,min=0,max=65536,step=1
  : values=34953,34953

How can that be?

According to his  lspci, he doesn't have a second sound card.

Any ideas?

Besides that it seems that VolumeKnob is physically broken on STAC9205s, 
Can anybody here with STAC9205/STAC9204/STAC9254/STAC9255 test it?

And last question, about STAC9254/STAC9255
There is no datasheet for that chip on the web, is this just STAC9205 + modem?

Best regards,
	Maxim Levitsky