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I just upgraded to Ubuntu 11.04. Unfortunately I didn't know that my graphics card didn't support the Unity desktop. When I logged in, the interface was totally unusable. I couldn't log out, because the logout button was disappearing sometimes and I couldn't click on it. How could I logout, if I forget to change the desktop settings?

I really want to use the new interface but my hardware isn't-the-best. Hmm...

Specs: PPC 500mhz processor, 384MB RAM (10.3 OSX)

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Can you edit your question to add some hardware information? –  Jorge Castro Apr 27 '11 at 21:56

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up vote 1 down vote accepted

Logging out whenever your interface dies

This used to happen to me quite a lot under 10.10 for various reasons, (mostly playing around with things I shouldn't), but I found a good way of getting back to the login screen.

Press Crtl+Alt+F1, which will take you to one of the background virtual terminals. (If you ever want to come back because you're just testing it press Ctrl+Alt+F7 or Ctrl+Alt+F8, one of which should take you back to the graphical interface.

In the fullscreen terminal, you'll be asked to log in. Log in using your normal username and pass word, and typesudo killall Xorg, which (after entering your password again), will kill Xorg and force it to restart back to the login screen.

When it restarts, it will show your user with a tick next to their name and say already logged in, don't worry about that, its referring to the virtual terminal that you just logged in to. You can switch back to it using Crtl+Alt+F1 as above to see it running, and you can log out of the terminal just by typing logout.

Hope that helps.

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