by wierd i mean:
it does not show the "stuff" in the upper right corner, like network conection
it does not show any icons
it have no wallpaper than just a purple and black.
there are some bottons who are missing, like:
are you sure you want to shut down
cancel (the Yes botton i gone
and so on
how can i come back to how it was?
oh.. and you might wonder how i shut it down: since i insalled ubuntu my pc battery is really weak (it has 2 min before it hibernates without charging) when i instaled ubuntu 12.04 from update maneger i forgot that. so when i tryed to move it to the living room, it "went to sleep"