I can say that the problem seems to be solved for me when I upgraded to Edgy. I never did solve the problem with Dapper.
But to judge from the comments of others, the problem still exists for some video cards. -- login screen crashes https://launchpad.net/bugs/42157 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
