This is a bug in the nvidia driver. They offer a workaround in their documentation and compiz uses it in gutsy but it doesn't work with every card. Are you using gutsy or feisty?
** Changed in: linux-restricted-modules-2.6.22 (Ubuntu) Sourcepackagename: compiz => linux-restricted-modules-2.6.22 -- System slow downs with desktop effects enabled https://bugs.launchpad.net/bugs/129340 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs