Logitech HD Webcam Pro c910 && snd_uaudio does not work

[Hans Petter Selasky]

On Wednesday 16 May 2012 18:08:07 Matthias Apitz wrote:
> El día Monday, May 14, 2012 a las 05:21:25PM +0200, Hans Petter Selasky 
escribió:
> > > Hi,
> > > The system where it does not work (r214444) does not have the usbdump
> > > utility; is there any debug in snd_uaudio to enable?
> > > Thanks
> > 
> > Yes,
> > 
> > hw.usb.uaudio.debug=15
> > 
> > If compiled with USB_DEBUG set.
> 
> This gives the following messages:
> 
> on plug-in:
> 
> May 16 18:00:36 tinyCurrent kernel: pcm1: <USB audio> on uaudio0
> May 16 18:00:36 tinyCurrent kernel: uaudio_attach_sub: emulating master
> volume May 16 18:00:36 tinyCurrent kernel: uaudio_mixer_init_sub:
> May 16 18:00:36 tinyCurrent kernel: uaudio_mixer_bsd2value: type=0x002
> val=-18176 min=-18176 max=-4864 val=-18176 May 16 18:00:36 tinyCurrent
> kernel: uaudio_mixer_write_cfg_callback: May 16 18:00:36 tinyCurrent
> kernel: uaudio_mixer_write_cfg_callback: May 16 18:00:36 tinyCurrent
> kernel: uaudio_chan_init: endpoint=0x86, speed=32000, iface=1 alt=3
> May 16 18:00:36 tinyCurrent kernel: uaudio_chan_init: fps=1000 sample_rem=0
> May 16 18:00:36 tinyCurrent root: /usr/local/etc/rc.d/webcamd: WARNING:
> failed to start webcamd May 16 18:00:36 tinyCurrent root: Unknown USB
> device: vendor 0x046d product 0x0821 bus uhub4 May 16 18:00:37 tinyCurrent
> last message repeated 2 times
> 
> (now started in another window dd if=/dev/dsp1.0 of=/tmp/snd)
> 
> 
> May 16 18:02:08 tinyCurrent kernel: uaudio_chan_record_callback:
> transferred 0 bytes May 16 18:02:13 tinyCurrent last message repeated 623
> times
>                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> May 16 18:02:13 tinyCurrent kernel: pcm1: chn_read():
> pcm1:virtual:dsp1.vr0: record interrupt timeout, channel dead
> 
> Thanks
> 
> 	matthias

Hi,

I believe this is a firmware bug. You should try to report to the manufacturer 
of the webcam.

--HPS