[alsa-devel] mmotm 2010-08-11 - audio volume issues

Jiri Slaby jirislaby at gmail.com
Thu Aug 12 23:06:22 CEST 2010

On 08/12/2010 08:59 PM, Valdis.Kletnieks at vt.edu wrote:
> On Wed, 11 Aug 2010 16:10:49 PDT, akpm at linux-foundation.org said:
>> The mm-of-the-moment snapshot 2010-08-11-16-10 has been uploaded to
>>    http://userweb.kernel.org/~akpm/mmotm/
> Something appears to be borked in the ALSA arena.  There's no actual volume coming
> out of the system, and 'alsamixer' is insisting that the volume slider only goes from 0
> to 10% or so, no further.  However, experimentation shows that the volume slider
> in 'xine' *does* affect the 'Amp-Out vals' lines, and alsamixer has *no* effect on
> what 'Amp-Out vals' lists.
> A diff of alsa-info.sh for the two kernels shows them being identical, so I'm only
> attaching one copy.
> It may be the weekend before I find time to do a bisection of this.

Didn't you (like some other people) get into the state where pulseaudio
doesn't work? It chooses as an output a dummy driver automatically, then
you can change volume, play sound, but actually it all goes to /dev/null.

It took me a while before I figured out that it's a "dummy" driver I
have in pulseaudio.


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