On Tuesday 12 February 2008, Sid Boyce wrote:
> Laurent Pinchart wrote:
> > On Saturday 09 February 2008, Sid Boyce wrote:
> >> With svn at revision 177, I can now get a picture when I do the skype
> >> camera test, but it freezes after a few frames. Camera is built-in on
> >> Acer Travelmate 7520 laptop.
> >
> > Any suspicious message in the kernel log ?
> >
> > Best regards,
> >
> > Laurent Pinchart
>
> I posted more dmesg info just a while ago. Also another post about build
> errors on revision 179.
>
> [10936.211150] compat_ioctl32: v4l2 ioctl VIDIOC_S_PARM, dir=rw
> (0xc0cc5616) [10936.211166] ioctl32(skype:28263): Unknown cmd fd(28)
> cmd(c0cc5616){t:'V';sz:204} arg(f6162e40) on /dev/video0
> [10943.613436] compat_ioctl32: v4l2 ioctl VIDIOC_S_PARM, dir=rw
> (0xc0cc5616) [10943.613436] ioctl32(skype:28263): Unknown cmd fd(28)
> cmd(c0cc5616){t:'V';sz:204} arg(f6162e30) on /dev/video0
> [10943.620761] compat_ioctl32: v4l2 ioctl VIDIOC_S_PARM, dir=rw
> (0xc0cc5616) [10943.620769] ioctl32(skype:28263): Unknown cmd fd(28)
> cmd(c0cc5616){t:'V';sz:204} arg(f6162e00) on /dev/video0Funny, if you look at the timestamps, your computer jumps back in time at this point. Are you experimenting with time travel ? :-) > [10942.250515] PGD 8063 PUD 0 > [10942.250523] CPA ffff810080000000 no pte level 0 > [10942.367316] PGD 8063 PUD 0 > [10942.367324] CPA ffff810080000000 no pte level 0 > [10942.415711] PGD 8063 PUD 0 > [10942.415720] CPA ffff810080000000 no pte level 0 I don't know where those messages come from, I'll just assume they don't hurt (they look related to memory management). > [10962.712515] uvcvideo: Failed to resubmit video URB (-45). > [10962.712515] uvcvideo: Failed to resubmit video URB (-45). > [10962.712515] uvcvideo: Failed to resubmit video URB (-45). > [10962.712515] uvcvideo: Failed to resubmit video URB (-45). > [10962.712515] uvcvideo: Failed to resubmit video URB (-45). Basically, the EHCI scheduler says that the time slot that the URBs should be queued for has already elapsed. This is a valid error when a device driver specifies a time slot, but not when asking the EHCI scheduler to queue URBs ASAP. I believe this is a bug in the EHCI scheduler. Could you try to push the issue on the linux-usb-devel mailing list ? Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
