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!
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
exit the root shell, and continue with a normal boot
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...