[Pkg-alsa-devel] Bug#524196: Bug#524196: USB webcam randomly disables soundcard

[Elimar Riesebieter]

* Philip [090415 13:12 +0100]
> Package: alsa-base
> Version: 1.0.17.dfsg-4
> 
> If a logitech pro 9000 webcam (with built in microphone) is plugged in
> then the Intel motherboard sound card will randomly fail on boot.
> This will appear in dmesg
> [   10.698812] cannot find the slot for index 0 (range 0-0), error: -16
> [   10.698812] Intel ICH: probe of 0000:00:1e.2 failed with error -12
> 
> Solution.
> Edit /etc/modprobe.d/alsa-base
> add this to the file
> 
> # Keep webcam from being loaded first
> options snd_usb_audio index=-2

snd-usb-audio covers more than only a webcam. There are snd cards
supported bei that driver which one wants to be the first card. So in
your case a file /etc/modprobe.d/sound.conf which encloses:

alias snd-card-0    snd-yourdriver
options snd-yourdriver  index=0
alias snd-card-1    snd-usb-audio
options snd-usb-audio index=1

were snd-yourdriver is your prefered driver, should do the job.

See also /usr/share/doc/alsa-base/README.Debian.gz.

Please let me know whether this works for you so we can close this
bug then ;-)

Elimar

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