kern/152622: [pcm] uaudio recording problem

[Hans Petter Selasky]

The following reply was made to PR kern/152622; it has been noted by GNATS.

From: Hans Petter Selasky <hselasky at c2i.net>
To: freebsd-multimedia at freebsd.org
Cc: Thierry Thomas <thierry at freebsd.org>,
 FreeBSD-gnats-submit at freebsd.org
Subject: Re: kern/152622: [pcm] uaudio recording problem
Date: Sun, 10 Apr 2011 13:17:16 +0200

 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 at 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