I had this problem too, and fixed it by disabling the use of fbdev in /etc/X11/xorg.conf (FBDev option for card, and fbdev module in module list).
Folks may want to try that as well. -- [r128] screen only updates every several minutes https://launchpad.net/bugs/23513 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
