Hi,

On Saturday 19 July 2008, martuf1 wrote:
> > Yes, please use luvcview and run it with
> >
> > luvcview -f yuv
> >
> > Don't forget to report luvcview error messages as well as driver messages
> > printed to the kernel log.
> >
> > Best regards,
> >
> > Laurent Pinchart
>
> Hi Laurent,
> I will write what I did:
>
> $> svn checkout svn://svn.berlios.de/linux-uvc/linux-uvc/trunk
> $> cd trunk
> $> patch -p0 < a.diff    (your patch)
> $> make
> $> sudo make install
> $> sudo depmod -a
> $> sudo modprobe uvcvideo
> $> dmesg
> [  680.144146] Linux video capture interface: v2.00
> [  680.150335] uvcvideo: Found UVC 1.00 device USB2.0 UVC PC Camera
> (174f:8a12)
> [  680.685512] uvcvideo: Failed to query (1) UVC control 2 (unit 0) :
> -110 (exp. 26).
> [  680.685521] uvcvideo: Failed to initialize the device (-5).
> [  680.686972] usbcore: registered new interface driver uvcvideo
> [  680.687252] USB Video Class driver (SVN r232)
>
> nb: no /dev/video0 device created
>
> $> sudo rmmod uvcvideo
> $> sudo modprobe uvcvideo
> $> dmesg
> [  694.869837] usbcore: deregistering interface driver uvcvideo
> [  697.376885] uvcvideo: Found UVC 1.00 device USB2.0 UVC PC Camera
> (174f:8a12)
> [  697.637572] usbcore: registered new interface driver uvcvideo
> [  697.637581] USB Video Class driver (SVN r232)
>
> nb: ok /dev/video0 device created
>
> $> luvcview -f yuv
> luvcview version 0.2.1
> Video driver: x11
> A window manager is available
> video /dev/video0
> ^C
> Stop asked
> ^Z
> [1]+  Stopped                 luvcview -f yuv
>
> $> kill -9 %1
> $> dmesg
> [  717.306510] uvcvideo: Failed to query (130) UVC control 1 (unit 0) :
> -110 (exp. 26).
>
> nb: Appear a black windows and as you can see I had to kill-9 the process
> to exit.
>
>
> $> sudo luvcview -f yuv
> luvcview version 0.2.1
> Video driver: x11
> A window manager is available
> video /dev/video0
> Unable to set format: 5.
>  Init v4L2 failed !! exit fatal
>
> $> dmesg
> [  726.914113] uvcvideo: Failed to query (129) UVC control 1 (unit 0) :
> -110 (exp. 26).
>
>
> What can I use to sniff usb traffic in windows vista?... There the cam
> is working...
> May that help you?

>From your report I would guess your problems are caused by timing issues. 
Could you try to repeat the same operations with kernel 2.6.26 ?

Best regards,

Laurent Pinchart
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