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After I installed the ATI/AMD FGLRX graphic drivers, the display output doesn't work and my display goes to sleep. I installed the drivers through the Additional Drivers systems settings tool.

I am able to change during the boot into to my previous patch version of Linux. I'm on 11.10.

Thanks!

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2 Answers 2

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Please consider these two links...

1)Binary Driver how to ATI -> this is about why fglrx is a problem and ati is recommendation

2) How to remove fglrx completely

Just read both topics ..you will learn lot of things...

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How did you install the driver ? You can probably just remove it or delete/move your xorg.conf

Boot to recovery mode, start a root shell. You will be at the command line without a graphical interface

sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.ati

exit the root shell, and continue with a normal boot

exit 
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Unfortunately this did not work. –  citadelgrad Dec 13 '11 at 3:18

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