This may be related to or the same as this bug: https://launchpad.net/distros/ubuntu/+source/xserver-xorg-driver- ati/+bug/16873
"Ubuntu freezes randomly when using the radeon or ati Xorg driver with Radeon 7000 cards." Though there are some differences: I am using a Radeon 7500 card, I only started to get the bug aftter upgrading to Dapper, didn't see it with Breezy. I think I'm using the ati driver as I have the package xserver-xorg- driver-ati installed, and I don't see any 'radeon' package. Also my xorg.conf above says driver "ati". I'll try to get an Xorg log. -- dapper system freeze https://launchpad.net/bugs/50687 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs