Hallo,
I found in this list message "Logitech QuickCam Pro for Notebooks
046d:0991 not working" from Mon Jul 28 10:18:08 CEST 2008. So now i will
ask about same problem. It seems some bugs was fixed, some new probably
made.

I have some random problem with this camera. Thirst of all cheese, some
time it's work, some time i gat only black screen, after this camera do
not work, so i need to replug it. With mplayer it working mostly normal
but after cheese it will not work too. The video chat with empathy has
same problem like cheese to. cheese and epmaty depend on gstreamer but
this seems to work fine if i use:

gst-launch v4l2src ! queue ! videorate !
video/x-raw-yuv,framerate=15/1 ! videoscale !
video/x-raw-yuv,width=640,height=480 ! ffmpegcolorspace ! videoscale !
ximagesink

 After cheese i get this demsg:

[ 1296.135911] usbcore: registered new interface driver snd-usb-audio
[ 1296.147366] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0991)
[ 1296.170101] input: UVC Camera (046d:0991)
as /devices/pci0000:00/0000:00:1a.7/usb1/1-6/1-6:1.0/input/input15
[ 1296.170139] usbcore: registered new interface driver uvcvideo
[ 1296.170142] USB Video Class driver (v0.1.0)
[ 2235.420181] uvcvideo: Failed to query (135) UVC control 2 (unit 2) :
-110 (exp. 2).
[ 2235.721428] uvcvideo: Failed to query (135) UVC control 2 (unit 2) :
-110 (exp. 2).
[ 2242.560187] uvcvideo: Failed to query (135) UVC control 2 (unit 2) :
-110 (exp. 2).
[ 2242.860179] uvcvideo: Failed to query (135) UVC control 2 (unit 2) :
-110 (exp. 2).
[ 2266.230184] uvcvideo: Failed to set UVC probe control : -110 (exp.
26).
[ 2271.350744] uvcvideo: Failed to set UVC probe control : -110 (exp.
26).
[ 2289.660019] usb 1-6: USB disconnect, address 6
[ 2293.430078] usb 1-6: new high speed USB device using ehci_hcd and
address 7
[ 2293.708270] usb 1-6: configuration #1 chosen from 1 choice

The guestion is, is it kernel, gstreamer or empathy and cheese bug?

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