gnome-shell performance under AMD E-350



Hi list!

I absolutely love gnome-shell, and it's getting better every day. Awesome work!

Anyway, I have a question I was hoping you could help me with. I'm having performance issues since buying a laptop based on the AMD E-350 platform (my previous experience was with an Intel 945GM + Core 2 Duo laptop and the shell was buttery smooth).

Simply going in and out of the overview mode doesn't feel as smooth as it should, like it's skipping frames. I tried the catalyst proprietary driver and that fixes that particular problem, it feels a lot faster. Of course, it introduces a bunch of new ones: lots of screen tearing, crashes of Xorg and the 3D apps, artifacts, delays when drawing gtk widgets like menus, etc. Basically it's a mess, and I'd rather use the open source drivers anyway.

I suspect the problem could be due to vsync; my system might be unable to keep up at 60fps, and skips frames and feels bad as a result. Is there any way to disable this behavior? I believe the fglrx driver doesn't support vblank sync with indirect rendering so that may be one of the reasons it doesn't have the issue. I'd honestly rather have a better framerate with screen tearing than poor performance but synced.

Also, is there a way to measure the framerate the shell is running at? I think that would help nailing down my problem.

Anyway, thanks for the help! Keep up the awesome job.
Mark


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