Hi, After some troubleshooting I have identified the precise source of this sluggishness. When I downgraded xserver-xorg-core sluggishness persisted, so I experimented with downgrading other packages selectively, and found the problem to be with libx11-6 (1.1.1-1ubuntu1). After downgrading to version 1.0.3-4ubuntu1 from the Herd4 alternative cd, performance is back to normal.
-- Sluggish rendering since xorg 7.2 update https://launchpad.net/bugs/88815 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
