I have Ubuntu running nicely on my AAO, except for one problem. Sometimes when I go to use the webcam (in skype or Cheese), or watch a video the system will lock up. Ctrl-alt-backspace will not work, requires a hard reboot. I was wondering if it was happening to anyone else, and if there is a solution to the problem. Next time it happens I will try to get some info from my logfiles to post here.