On Tuesday 31 July 2007, David wrote:
> Hello,
>
> Sorry, but I did not manage to know it yet.
>
> In the output of lsusb -v , where is the key to know whether the webcam is
> UVC, gspca, or other?
>
> Thank you.

Have a look at http://linux-uvc.berlios.de/faq/

USB devices report a class identifier in their descriptors. If the class ID is 
equal to 255 (Vendor Class), the device has a non-standard interface and 
implements a vendor-specific protocol. If the class ID is equal to one of the 
values defined by the USB Implementers Forum, the device implements a 
standard, documented protocol.

The UVC class ID is 14. If your webcam reports another class ID, it might 
still implement the UVC interface (early Logitech UVC webcams did so) but 
that's very unlikely. There is no way to tell which driver to use when the 
class ID is 255. Your best bet would then be to Google for the device 
VID/PID.

Regards,

Laurent Pinchart
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