webcam works on one of two Lucid systems

Marlon yodatsi at
Sat Jul 17 02:24:19 UTC 2010

(default language pt-br, sorry en-us errors)

for debug i´ve used mplayer to test my webcams
for me, your problem seems to be driver..

apt get some libs (video4linux,v4l-conf, xawtv, xawtv-plugins, v4l or v4l2

mplayer tv:// -tv driver=v4l:width=352:height=288:device=/dev/video0

IF (v4l2)

mplayer tv:// -tv driver=v4l2:width=352:height=288:device=/dev/video0

my search (


Marlon Valério
   T0ddy Stone Brains

2010/7/16 Adam Funk <a24061 at>

> I have a Logitech USB webcam (USB ID 046d:0804) that works
> effortlessly on one computer but not the other (both running Lucid).
> On both machines I get nearly identical entries in the syslog when I
> plug it in (with varations in the numbers according to the USB port).
> usb 2-4: new high speed USB device using ehci_hcd and address 2
> usb 2-4: configuration #1 chosen from 1 choice
> Linux video capture interface: v2.00
> uvcvideo: Found UVC 1.00 device <unnamed> (046d:0804)
> input: UVC Camera (046d:0804) as
> /devices/pci0000:00/0000:00:04.1/usb2/2-4/2-4:1.0/input/input7
> usbcore: registered new interface driver uvcvideo
> USB Video Class driver (v0.1.0)
> usbcore: registered new interface driver snd-usb-audio
> On both machines /dev/video0 appears, and it shows up in Skype's
> pulldown menu under video options.  But on one machine the video from
> it is always completely black.  (I've tried cheese with the same
> results.)
> Any suggestions for debugging?
> --
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