Em Wednesday 13 February 2008 21:18:57 Laurent Pinchart escreveu:
> 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/video0
>
> Funny, 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 ?There is an patch here: http://bugzilla.kernel.org/show_bug.cgi?id=7694 That can solve this, solved a similar problem here with a Syntek webcam (after some time of streaming the -EL2NSYNC error would show up). > > Best regards, > > Laurent Pinchart -- []'s Herton _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
