I made a upgrade right now, and the problem disappeared :-) GM965/X3100
Package: xserver-xorg-video-intel State: installed Automatically installed: yes Version: 2:2.4.1-1ubuntu4
I made a upgrade right now, and the problem disappeared :-) GM965/X3100
Package: xserver- xorg-video- intel
State: installed
Automatically installed: yes
Version: 2:2.4.1-1ubuntu4