In the duplicate bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/424594 it is described that this happens due to the pwc module is not loaded the right way.
If you unload the module and then plug it in it works just fine. -- Logitech QuickCam USB webcams using pwc module (Pro, 3000, 4000) do not work if connected after booting https://bugs.launchpad.net/bugs/443278 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
