[alsa-devel] Cannot load snd-usb-audio on 3.12-rc2

Daniel Mack zonque at gmail.com
Tue Sep 24 17:52:00 CEST 2013

Hi Sarah,

On 24.09.2013 01:41, Sarah Sharp wrote:
> The snd-usb-audio driver no longer loads properly on 3.12-rc2 when I
> plug in my USB headset.  It worked fine on 3.11-rc4 (not sure about
> vanilla 3.11).
> Trying to manually load the driver fails:
> sarah at xanatos:~$ sudo modprobe snd-usb-audio
> FATAL: Error inserting snd_usb_audio
> (/lib/modules/3.12.0-rc2/kernel/sound/usb/snd-usb-audio.ko): Invalid argument
> dmesg shows:
> [   44.231668] snd_usb_audio: `-2' invalid for parameter `index'

That's really strange. I just tested on an ARM board where I currently
run 3.12-rc2 as well, and I can load the module without problems. Also,
sound/usb/card.c (where the params are declared) hasn't seen an update
in 3.12.

I suspect your OS is passing "index=-2" from something like
/etc/modprobe.d/* or cmdline settings. Could you investigate in that


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