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Aloha, I'have been tried for several times updated software packages or drivers.

But always facing the problem. I can't log in to the dekstop, just at the terminal, it ask for username and login password.

Ater entered the username and password, still at terminal.. that's all..

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What sort of video card do you have? What drivers do you have installed? Are they built against the current version of the kernel that you're booting? – M. Tibbits Apr 6 '11 at 2:26

Log in on the console (the black screen you're referring to). Then, look in /var/log/Xorg.0.log and see if there's anything relevant there. If you don't find anything there, check out ~/.xsession-errors.

If you don't know how to look at files from the command line, try this:

~:$ less /var/log/Xorg.0.log
~:$ grep -v DEBUG < ~/.xsession-errors | less  # Filters out lines containing DEBUG

If you don't understand what you're seeing, post it here.

(PS: I know this isn't really much of an answer--it's really just troubleshooting--but since I'm not allowed to post comments, I have to frame this as an answer.)

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