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I changed my ubuntu screen-resolution and now it's everything black and I can't change it againd to the old resolution. What do I do?

Thank you.

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2 Answers 2

This question belongs on SuperUser.com

In the mean time, there is a file in /etc/X11 called xorg.conf which contains the screen configuration. There is probably also one or more backup files which contain previous configurations. You can try something like this:

cd /etc/X11
sudo cp xorg.conf xorg.conf.BAD
sudo cp name-of-backup-file xorg.conf

Then switch back to X using ALT+F7 or similar and pressing CTRL+ALT+Backspace to reload X.

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Have you tried turning it off and on again?

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Yes! I did it many times. –  user19583 Sep 7 '09 at 13:27
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