Recompiled xorg-x11-drv-ati-6.14.4-6.20120602git930760942.fc17, reenabling ums (the fedora package has a patch that disables ums), and booted with nomodeset.
With this, the display seems stable again, and the color distortion is gone.
So, does this mean that the problem is in the kernel or in the driver?
There are still problems with GTK widgets, but X widgets and Qt widgets are fine.
Recompiled xorg-x11- drv-ati- 6.14.4- 6.20120602git93 0760942. fc17, reenabling ums (the fedora package has a patch that disables ums), and booted with nomodeset.
With this, the display seems stable again, and the color distortion is gone.
So, does this mean that the problem is in the kernel or in the driver?
There are still problems with GTK widgets, but X widgets and Qt widgets are fine.
Ingvar