Thanks a lot guys for the helpful answers.
The problem is that mouse and keyboard is locked. happend to me when trying to run a game (cant remember the name, some ego shooooter). dont know if it was only the keyboard, but I guess it had problems with the graphic. did a powerbuttonrestart and my gnome was all messed up after. luckily reinstall is piece of cake with ubuntu ;-) still annyoing though...
excited about the elephants ;-) big thanks for that... found this one I want to share here: http://en.wikipedia.org/wiki/Magic_SysRq_key
, check out the section about Remote access
How would you use telenet in the console?