I believe many of the issues mentioned here are either bug #60288 (crashes with DRI) or bug #67487 (Ati AGP speed) for which there are some workarounds or test packages. Can you please take a look on those? If you still think your problem is not a duplicate, please attach more information like Xorg.0.log and xorg.conf.
** Changed in: xserver-xorg-video-ati (Ubuntu) Status: Confirmed => Needs Info -- Screensaver freezes on Dapper (ATI Radeon 8500 LE) https://launchpad.net/bugs/38181 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs