[alsa-devel] 1.0.15: volume levels drift on HDA with STAC92XX codec
maximlevitsky at gmail.com
Mon Nov 5 15:53:23 CET 2007
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.
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-22.214.171.124-36
numid=0,iface=MIXER,name='Master Playback Switch'
numid=0,iface=MIXER,name='Master Playback Volume'
How can that be?
According to his lspci, he doesn't have a second sound card.
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?
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