Logitech HD Pro Webcam C920

[Russell L. Carter]

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.

Thanks!
Russell