Many opengl screensavers crash with proper 3d support. There is already a bug about this, but for some strange reason the 3d-screensavers are still installed and enabled with a default install of ubuntu.
At least you were able to get a crash log. I've had many machines just come to a grinding halt. -- gnome-screensaver crash https://launchpad.net/bugs/64770 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
