Logitech HD Pro Webcam C920

[Hans Petter Selasky]

On 2020-03-24 21:10, Russell L. Carter wrote:
> Greetings,
> 
> I have a shiny new Logitech C920S USB webcam which identifies as a
> [-d ugen5.9] vendor-0x046d-HD-Pro-Webcam-C920 -S E0E2DC0F
> when running webcamd as root.  I can't get /dev/video0 created.
> 
> I have put in the mandatory 4 hours or so on my own with google and
> the man pages as my helpers, and I think I'm close, but so far
> no joy.
> 
> I can get it specifically matched with devd via
> /usr/local/etc/devd/webcamd.conf (though no actions work).
> 
> So for example, if I run, as root:
> root at feyerabend> webcamd -d ugen5.9 -N vendor-0x046d-HD-Pro-Webcam-C920 
> -S E0E2DC0F -M 0
> webcamd: Cannot find USB device
> 
> Alternatively:
> 
> root at feyerabend> /usr/local/etc/rc.d/webcamd start ugen5.9
> Attached to ugen5.9[0]
> root at feyerabend>
> 
> But no /dev/video0 creation, no running webcamd, nothing in
> /var/log/messages etc.
> 
> When I plug in the cam, I get the following in /var/log/messages:
> Mar 24 13:07:56 feyerabend kernel: ugen5.9: <vendor 0x046d HD Pro Webcam 
> C920> at usbus5 (disconnected)
> Mar 24 13:08:23 feyerabend kernel: usb_alloc_device: Failure selecting 
> configuration index 0:USB_ERR_TIMEOUT, port 4, addr 8 (ignored)
> Mar 24 13:08:23 feyerabend kernel: ugen5.9: <vendor 0x046d HD Pro Webcam 
> C920> at usbus5
> 
> Not sure if that long timeout is significant.
> 
> Any help is much appreciated.
> 

Try:

usbconfig -d 5.9 set_config 0

The error message above means your webcam is not working properly. Can 
you also show the output from usbconfig.

--HPS