I have the very same problem on Thinkpad T42, changing xorg.conf improves the situation, but still non as good as it used to be in intrepid or hardy.
lspci | grep VGA: 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon RV250 [Mobility FireGL 9000] (rev 02) -- [r100-rv200] very poor Xorg performance - XAA solves this https://bugs.launchpad.net/bugs/363238 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs