Okay the Problem's gone. I've deinstalled beagle-desktop-search-daemon. This was causing the overheating after 10 min or something. Process was running using like 80 to 90 percent of the resources, by using more and more resources, when not using Mouse or Keyboard for 10 min or something.
Thanx for your help sumsoul -- System Crash when doing nothing for ca 10 min https://launchpad.net/bugs/70035 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs