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I just have installed Ubuntu 12.04 64 bits just few days ago, and everything is ok, but just some times when I tray to shutdown the system just freezes for a long time, and I have to force the shutdown with the power button.

Any advise or any way to use the terminal to know what is the problem.

I'm using a Dell with ATI video card, 4GB Ram.

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Looks like a possible duplicate. You should go here. And try to see if it solves your problem.


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I have tried that before, but din't work !! Thanks so much !!!!.... – abraham May 24 '12 at 15:33

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