Originally Posted by jiml8
What is your video card? How much memory is in your system? Do you still have sound when this happens? If you hit alt-tab do you see any windows? How about ctrl-tab? If you hit ctrl-F1 are you taken to a console window? (ctrl-F7 to return to X).
It's no effect pressing alt + tab. Just blank and can't do anything. And the computer still on.
I use ubuntu 8.04, but this problem isn't happened when I use older version of ubuntu