Comment 2 for bug 654003

Exact same issue... I have two QuickCam Pro's One works, the other does not.

zmdc.log
04/24/12 00:00:43.083066 zmdc[1955].INF [Starting pending process, zmc -d /dev/video1]
04/24/12 00:00:43.084820 zmdc[1955].INF ['zmc -d /dev/video1' starting at 12/04/24 00:00:43, pid = 4081]
04/24/12 00:00:43.120874 zmdc[1955].INF ['zmc -d /dev/video1' crashed, signal 6]

zmu
# zmu -d /dev/video1 -q -V1 -v
Video Device: /dev/video1
# zmu -d /dev/video1 -q -V2 -v
Error, failed to query crop capabilities /dev/video1: Invalid argument