Sometimes cheese zombifies, is assigned to parent 1 and becomes unkillable, after it has worked a few times. The webcam is an UVC one. UCView still works most of the time. However, sometimes I have to remove and reload the uvcvideo module. Cheese still does not work after reloading the module.
Probably the same issue as bug 443499 Supposed to be fixed in trunk upstream. *** This bug has been marked as a duplicate of 443499 ***