Re: [Linux-uvc-devel] QC fusion almost working in kopete

[Nick W. <ni...@cu...>]

On Friday 03 February 2006 2:23 am, Nick Wiltshire wrote:
> On Thursday 02 February 2006 1:23 pm, Laurent Pinchart wrote:
> > Hi Nick,
> >
> > > I'm pretty new to the list, hopefully I can contribute something.
> >
> > Seems you can at least contribute problems :-)
>
> Yes, that I can do!
>
> > > Im running kopete 0.11.1 with kde 3.5.1 on a Gentoo system, kernel
> > > 2.6.14.3. I grabbed the driver (rev 16), compiled, installed,
> > > loaded...dmesg said all was well. I fired up kopete and the camera was
> > > working(!), though zoomed in so all I could see was my forehead :)
> >
> > When Kopete receives an image bigger than it expects, only the upper-left
> > corner of the image will be used instead of resizing it properly.
>
> Is there a workaround I've missed?
>
> > > I left the config window for a minute, then went back to it. Now the
> > > window just showed a pixelized QT logo. dmesg showed:
> > >
> > > uvcvideo: Failed to query UVC control 1 (unit 0) : -110.
> > >
> > > so I unloaded/reloaded the driver:
> > >
> > > usbcore: deregistering driver usbvideo
> > > uvcvideo: Found UVC 1.00 device <unnamed> (046d:08c1)
> > > uvcvideo: Failed to query UVC control 1 (unit 0) : -110.
> > > uvcvideo: Failed to initialize the device (-5).
> > > usbcore: registered new driver usbvideo
> > > USB Video Class driver (v0.1.0)
> >
> > -110 is -ETIMEDOUT. This means the camera failed to answer fast enough.
> > I'm not sure why this happens, but do you remember if the blue light was
> > on when you went back to the Kopete window ?
>
> Yes, it was.
>
> > I noticed that the webcams are
> > sometimes slower to answer when video streaming is on. It seems that your
> > camera was left in an unknown state. Unplugging and replugging the webcam
> > should fix the problem. If not, the USB subsystem might be screwed up.
>
> Did that, now I get lines :) see...I can contribute lots of problems.
>
> > Can you reproduce the problem ?
>
> Yes.
>
> > Does unplugging and replugging the webcam
> > make it functionnal again ?
>
> Sort of (the "lines" move when the camera sees motion, but the picture is
> unrecognisable).
>
> > Could you try upgrading to kernel 2.6.15 and
> > see if things are better ?
>
> I'd be happy to. I will let you know tomorrow if it works -- if not I'll
> try Alexandre Becoulet's patch and report on that as well.
>

Apologies for taking so long to get to this. I still have the same issue with 
a 2.6.15.3 kernel. I was unable to patch the source - it kept saying the 
patch was invalid and I couldn't figure out why for the life of me.

I also tried revision 19, the problem still exists.

Alexandre - could you do a similar patch for r19 ? I'd really like to see if 
it works.

> If it matters, I was able to sync my iPod, so the USB subsystem must still
> be in decent shape.
>
> Nick