Hi Paulo,
> I bought a Quickcam UltraVision (VID/PID: 046d/08c9) to use with Linux.
>
> I downloaded the driver using subversion and tested both the one in
> "trunk" and the one in "branches". They both gave the same error message:
>
> "No valid video chain found."
>
> I used a 2.6.17-mdv6 kernel (the one that comes with Mandriva 2007). I
> can test with a later kernel if you think that will make a difference.
>
> Is this a known problem? Are there any patches I can try or is there
> some more information I can provide to try to find out what's going on?
I have no Quickcam UltraVision, so I can't tell for sure where the problem
comes from.
Could you try setting the parameters trace to 15 (either with 'modprobe
uvcvideo trace=15' or 'echo -n 15 > /sys/modules/uvcvideo/parameters/trace'
when the module is loaded) before plugging the webcam ? Then please send me
all the messages output by the driver to the kernel log, as well as the
device USB descriptors ('lsusb -d 046d: -v' with usbutils >= 0.72 or usbutils
CVS).
Cheers,
Laurent Pinchart
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