Hi,
I'm a Cheese developer, recently many users (mainly from ubuntu
intrepid) reported us several issues with uvcvideo drivers.
Actually they reported many issues with the other webcam drivers too,
probably related to the changes in webcam drivers with 2.27 kernels
(gspca v2, uvcvideo included into mainline, strange formats decoding
moved to userspace, apps switching to libv4l..). Probably some
regression went in too with so much changes, but I'm just guessing.

This particular issue with uvcvideo seems to happen both with cheese
and gstreamer alone, some ioctl call locks the webcam making it
unusable anymore without reloading the module.
I'm personally experiencing the issue only if use my microdia (I don't
have access to my laptop now, will provide the exact id later) webcam
at the maximum supported resolution (1280x1024) , it works just fine
with the other ones.
But as soon as I try to access it with
gst-launch-0.10 v4l2src ! video/x-raw-yuv, width=1280, height=1024 ! xvimagesink
the light turns off and the webcam is no more usable.

Other users reported slightly different behaviours but all end up with
a webcam lock. You can find more info at the correspondent bugzilla
and launchpad bugs:

https://bugs.launchpad.net/bugs/290506
http://bugzilla.gnome.org/show_bug.cgi?id=559057

It seems the driver works fine with other software so maybe it is a
gstreamer only issue but other drivers work nicely so I think it's
still a driver issue.
Could you give me some little help to better triage this thing and fix
it in the right place?

Thanks
Filippo

-- 
Filippo Argiolas
Jabber: [EMAIL PROTECTED]
Web: http://fargiolas.netsons.org
Irc: fargiolas (GimpNET, Freenode)
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