I have the same problem, that is, the Login Screen is greyed out, including the unlock button.
Note: I just installed Natty Narwhal (Ubuntu 11.04) on my system. I have a Radeon 2600 XT video card, AMD Athlon 64 X2 Dual Core Processor 6400+ and 4 gigs of RAM . I was not able to login successfully the first time. I had to log-in using the Ubuntu Desktop Edition (Safe Mode). I have since rebooted back into "Safe Mode" and the Login Screen is still greyed out. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/570885 Title: Login Screen Settings greyed out and unlock button non-responsive -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs