I got a problem. I'm using the radeonhd driver from git on my HD4850. Everything was going fine until I decided to test out screen rotation. Now whenever I try to log back in the screen shows up upside down and the system seems to freeze (neither keyboard or mouse respond).
I can go back to the radeon driver or even fglrx and I get a usable screen again, but then if I try to load up radeonhd I still get an upside down frozen screen. Any way to revert the changes?