so I'm running Kubuntu on my laptop with the 2.6.28-14-generic kernel. Sometimes however the system freezes: No reaction on any keyboard strokes anymore (not even the caps lock light), the display is not updated anymore (e.g. process bars of programs), only the mouse pointer still works normally (though no clicking possible). Hence, since I can not end X nor switch to a text-only login, I have to turn the computer off and restart.
Obviously I'd like to fix this
So I'm suspecting either KDE to be the cause of this, since it seems related to new windows opening or moving and the like, or perhaps the kernel itself since the system freezes completely? Anyway, how can I find out what causes this, are there logfiles written which might give away some hints? Where are they and how can I access them?
Thank you for your help!