I have the same issue with XGL. I am running Edgy Eft with Beryl 0.1.4, ATI fglrx driver 8.32.5-1, and xserver-xgl 7.0.0.git.20060725-0ubuntu2.1. The screensaver causes XGL to crash and the login screen appears. It is reproducible if I preview the screensaver using system preferences.
-B ** Attachment added: "Crash Report" http://librarian.launchpad.net/5594915/_usr_bin_Xgl.1000.crash -- screensaver make crash GDM https://launchpad.net/bugs/35501 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs