Well, the 12.1 upgrade (Jan 25) at least made Gnome3 usable… The tearing and bad rendering seen with
fglrx have finally gone but everything is painfully slooooooooooow.
Two things helped me get an almost responsive desktop, and I don’t know which one actually did the trick. They should actually do the same thing, but who knows?
The first thing I did is to go to the Catalyst Control Center and disable both Vsync (under 3D section) and Tear-Free (under Monitors) options. That seemed to give a little boost to the overall responsiveness of my desktop, but another thing I found out from a comment to a bug report on ATI’s bugzilla is to add this little magic line to your
This should be the equivalent for disabling the Vsync option from the Catalyst Control Center, I guess, but after rebooting everything seems to run a lot more smoothly!