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Date:      Sun, 10 Apr 2011 13:17:16 +0200
From:      Hans Petter Selasky <hselasky@c2i.net>
To:        freebsd-multimedia@freebsd.org
Cc:        Thierry Thomas <thierry@freebsd.org>, FreeBSD-gnats-submit@freebsd.org
Subject:   Re: kern/152622: [pcm] uaudio recording problem
Message-ID:  <201104101317.16549.hselasky@c2i.net>
In-Reply-To: <201104101311.22757.hselasky@c2i.net>
References:  <201104101010.p3AAAEQ6022759@freefall.freebsd.org> <20110410104827.GD11620@graf.pompo.net> <201104101311.22757.hselasky@c2i.net>

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On Sunday 10 April 2011 13:11:22 Hans Petter Selasky wrote:
> On Sunday 10 April 2011 12:48:27 Thierry Thomas wrote:
> > On sun 10 apr 11 at 12:18:20 +0200, Hans Petter Selasky
> > <hselasky@c2i.net>
> > 
> >  wrote:
> > > It looks like your recording device does not have a volume control. If
> > > you:
> > > 
> > > dd if=/dev/dsp1.0 of=/dev/dsp0.0 bs=64
> > > 
> > > Do you then hear anything?
> > 
> > Nothing, but an error is displayed:
> > 
> > $ dd if=/dev/dsp1.0 of=/dev/dsp0.0 bs=64
> > 
> >                       ~ dd: /dev/dsp1.0: Invalid argument
> > 
> > 0+0 records in
> > 0+0 records out
> > 0 bytes transferred in 5.000121 secs (0 bytes/sec)
> > 
> > $ ll /dev/dsp1.0 /dev/dsp0.0
> > crw-rw-rw-  1 root  wheel    0, 137  9 avr 17:01 /dev/dsp0.0
> > crw-rw-rw-  1 root  wheel    0, 160 10 avr 12:43 /dev/dsp1.0
> > 
> > Best regards,
> 
> Could you show dmesg with USB debugging on for USB audio while doing this.
> Maybe the webcam needs to be running before you get audio.
> 

Also dump the configuration descriptor for your device using:

usbconfig -d X.Y dump_curr_config_desc

--HPS



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