Just to add, I also have this problem, so it's not an nVidia problem. i945GM, and the description exactly matches what goes on on my Acer laptop (5630) when I run the braid screensaver.
Bug continues as of today (April 1st) on an updated Hardy Beta. -- braid screensaver crashes system with compiz activated https://bugs.launchpad.net/bugs/101943 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