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

Philip subs at christiantena.net
Fri May 1 21:32:40 UTC 2009

there is no /etc/modprobe.d/sound.conf on my system
but there is a /etc/modprobe.d/sound
so I edited that as you suggest, and removed my entry from
so far it seems to work
I haven't tried disconnecting the webcam though....
I was just hoping that there might be a more automatic way for this to
happen when people install alsa rather than editing conf files
I'm happy for you to close the bug.  Hopefully folks will find it when
they have the same problem that I had.
thanks, Philip

Elimar Riesebieter wrote:
> * 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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