The fact that disconnecting the webcam solves the problem leads me to the conclusion that you are experiencing the symptoms of bug #884210, so I'm marking this report as a duplicate of that one.
Feel free to report any other bugs you may find. Thanks for making Ubuntu better!
Thanks for your reply.
The fact that disconnecting the webcam solves the problem leads me to the conclusion that you are experiencing the symptoms of bug #884210, so I'm marking this report as a duplicate of that one.
Feel free to report any other bugs you may find. Thanks for making Ubuntu better!