Comment 28 for bug 447692

I am running Ubuntu 10.04 beta 2 (daily updates) and experiencing the same thing: Ctrl-Alt-F1..6 freezes the X screen but does not make it go away. Ctrl-Alt-F7 reactivates the X session. Sometimes several Ctrl-Alt-F7s are necessary, or maybe it just takes many seconds to reactivate the X session.

My computer is a notebook with a secondary screen attached.

I will try to attach the relevant output from Xorg.0.log, though I have no idea if it can be of any help.