I have installed the AMD 12.11 beta drivers on my Ubuntu 12.10 but sadly it does not start anymore and it hangs in the initial purple screen.
Any device,? How can I fix this?
closed as off topic by Ringtail, Alvar, Takkat, Eric Carvalho, Thomas W. Jan 4 '13 at 3:22
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You will have to manually remove the drivers. You can do this by either entering recovery mode or cli mode.
Removing AMD Drivers
Check here for further information.