The Bug seems to be solved by a new update now. Obviously this was the same problem as it has occurred in Gutsy, depending on the "linux-backports-modules". The new update installed this module (linux-backports-modules-generic in my case) and ... voila: everything is fine now!
Update:
The Bug seems to be solved by a new update now. Obviously this was the same problem as it has occurred in Gutsy, depending on the "linux- backports- modules" . The new update installed this module (linux- backports- modules- generic in my case) and ... voila: everything is fine now!