kern/158979: [snd_uadio] snd_uaudio fails to initialize
built-in microphone in Logitech Webcam C160
Hans Petter Selasky
hselasky at c2i.net
Sun Jul 17 09:50:11 UTC 2011
The following reply was made to PR kern/158979; it has been noted by GNATS.
From: Hans Petter Selasky <hselasky at c2i.net>
To: Dmytro Pryanyshnikov <lynx.ripe at gmail.com>
Cc: bug-followup at freebsd.org
Subject: Re: kern/158979: [snd_uadio] snd_uaudio fails to initialize built-in microphone in Logitech Webcam C160
Date: Sun, 17 Jul 2011 11:42:43 +0200
On Sunday 17 July 2011 11:31:25 Dmytro Pryanyshnikov wrote:
> Hello!
>
> >From: Hans Petter Selasky <hselasky at c2i.net>
> >Date: Sun, 17 Jul 2011 09:45:41 +0200
> >Hi,
> >
> >Can you try and see if any of the quirks mentioned at the following link
> >
> >helps:
> > http://wiki.freebsd.org/WebcamCompat
>
> Well, it helps only partially. Indeed, after
>
> 1) plugging in my Logitech Webcam C160;
> 2) running 'pwcview' and exiting from it;
> 3) issuing 'usbconfig -d ugen4.2 do_request 0x22 0x01 0x100 0x86 0x03
> 0x80 0xBB 0x00'
>
> timeout problem has gone, BUT the sensitivity of the microphone
> becomes very low (I could only hear knocks on the camera hull, but
> almost can't hear my own voice in the recorded samples). And
> /dev/mixer3, which corresponds to the webcam microphone, doesn't
> affect it's sensitivity at all:
>
>
> dmitry at lynx$ mixer -f /dev/mixer3
> Mixer vol is currently set to 75:75
> Mixer pcm is currently set to 75:75
>
> dmitry at lynx$ mixer -f /dev/mixer3 vol 100 pcm 100
> Setting the mixer vol from 75:75 to 100:100.
> Setting the mixer pcm from 75:75 to 100:100.
>
> (doesn't change mic sensitivity)
>
> dmitry at lynx$ mixer -f /dev/mixer3 vol 0 pcm 0
> Setting the mixer vol from 100:100 to 0:0.
> Setting the mixer pcm from 100:100 to 0:0.
>
> (doesn't change mic sensitivity)
>
Hi,
Can you build a kernel with "options USB_DEBUG" or when using the module to
build add "CFLAGS+=-DUSB_DEBUG" in the sys/modules/sound/.../uaudio/Makefile ?
Then set:
sysctl hw.usb.uaudio.debug=15
Then plug the device and send resulting dmesg.
--HPS
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