Re: glxgears stutters in Fedora, not in Ubuntu
This seems to be happening to me now, in Gentoo with KDE 4.2.0. With the 180.22 drivers and kernel 2.6.22, everything was fine. Updated to 180.29 and kernel 2.6.27, and OpenGL (glxgears, Neverwinter Nights, GZDoom) apps started stuttering like mad, to the point of being unplayable. Oddly enough, it's not a blanket problem. Some games don't stutter at all (such as Half-Life 2 in Wine, and native Doom3), and turning off KDE's desktop effects help a little.. though not enough to be really playable for the problem apps.
I've tried updating to the 180.37 drivers, but no luck.