Ok, I've got debian sid, xorg 7.0.17, and a Radeon 7000.
I've got xorg.conf set to load the radeon driver set, and dri and glx modules. This used to work well under 6.9.x but at some point this broke and I'm trying to figure out how to fix it. running glxgears things are smooth and good for about 2 seconds then they start getting jerky, and after another few seconds almost appear to be going backward and forward like a dying watch.

Those are from my debconf generated xorg.conf. Originally Driver "ati" was set, but I changed that because basic desktop things were running REALLY slow (they're not going so well now, but at least the lags are tolerable and possibly the program rather than X)

I've searched google and can't find anything relevent to this version of xorg. Is this fixable?

Ok. Update. Without doing anything more than having rebooted which I've done plenty of times since this issue began... all is well. I just played the smoothest game of Planet Penguin Racer I can remember having.

Anyone know a religion that will perform an exorcism on a computer?