Comment 8 for bug 446578

On my radeon x1200 (rs690) the desktop loads but when opening any application window (for example system settings) Xorg crashes and I'm back at kdm login. From this point on changing to terminal ctrl+alt+f1 doesn't work as by doing that I'm left with kdm bitmap and some graphical garbage is produced at the top of the screen.

When compositing is disabled everything is ok, also strangely when booting up the kernel with radeon.modeset=1 and using KMS compositing in kde works as it should and the bug is gone.