kern/152622: [pcm] uaudio recording problem

Oliver Fromme olli at
Sun Apr 17 15:30:15 UTC 2011

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

From: Oliver Fromme <olli at>
To: freebsd-multimedia at FreeBSD.ORG, FreeBSD-gnats-submit at FreeBSD.ORG,
        thierry at FreeBSD.ORG
Subject: Re: kern/152622: [pcm] uaudio recording problem
Date: Sun, 17 Apr 2011 17:29:31 +0200 (CEST)

 Thierry Thomas wrote:
  > According to <>, there is a
  > workaround, which is working for olli@ with two webcams and also for
  > mine:
  > - firstly, you have to launch webcamd
  > I do that automatically by adding the following lines in my
  > /etc/devd.conf:
  > attach 100 {
  >         match "vendor" "0x046d";
  >         match "product" "0x0825";
  >         action "/usr/local/sbin/webcamd -d ugen4.3 -i 0 -v 0";
  > };
  > (replace "0x0825" and ugen4.3 according to dmesg)
  > - then you have to open the camera device (/dev/video0) by an
  > application (e.g. pwcview)
  > - then run the following command:
  > # usbconfig -d ugenX.Y do_request 0x22 0x01 0x100 0x86 0x03 0x80 0xBB 0x00
  > Replace "ugenX.Y" with your device, according to the output from dmesg.
  > That's all!
 Hans Petter Selasky posted a small patch:
 Would you please give it a try?  With that patch, I do not
 need the "usbconfig do_request" command anymore with my
 C210 or C310 HD.  I still need to do a "usbconfig reset",
 Best regards
 Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
 Handelsregister: Registergericht Muenchen, HRA 74606,  Geschäftsfuehrung:
 secnetix Verwaltungsgesellsch. mbH, Handelsregister: Registergericht Mün-
 chen, HRB 125758,  Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart
 FreeBSD-Dienstleistungen, -Produkte und mehr:
 Blogging:  Never before have so many people
 with so little to say said so much to so few.

More information about the freebsd-multimedia mailing list