Re: ALSA problem?

[Elimar Riesebieter <riesebie@lxtec.de>]

* Stephen Powell [100403 19:06 -0400]
> On Sat, 3 Apr 2010 15:00:11 -0400 (EDT), Elimar Riesebieter wrote:
> > Stephen Powell wrote:
> >> That can't be right.  What's the output of amixer?
> >
> > The udev system recoognized a usb webcam as an audio device
> > (snd-usb-audio) and it becomes soundcard 0 in ALSA's card devices.
> >
> > alsamixer by default uses soundcard 0. See alsamixer(1). Webcams
> > don't have a mixer device.
> 
> Aha!  Good catch.  I missed that.  And now the obvious question is,
> "Why?"  Why does udev think that that a webcam is a sound card?
> Isn't the right solution to this problem to prevent a webcam
> from being misidentified as a sound card? 

Will be fixed next upload of alsa-base.
There is already a bug:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=574593
http://svn.debian.org/wsvn/pkg-alsa/?op=rss&rev=2385&sc=1&isdir=1

> Changing the priorities of multiple sound cards makes sense if
> there really are multiple sound cards, but if there's really only
> one then why not try to prevent the misidentification in the first
> place?

It is just sorted by the order of the bus check while booting.

Elimar


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  Spike the office water cooler;-)