Comment 147 for bug 177492

Juan Carlos: thanks for the link! seems to have solved the issue for some, but i'm still getting much lower fps than I should be on my 945 (350 instead of 900). with compositing on its an abysmal 270... :( no stranger to getting direct rendering working so i've tried all the usual.. seems there is still a bug here

For those interested in the fix, try running "vblank_mode=0 glxgears -info" and if that improves your speed, follow the instructions in the above posters link