I upgraded my UB 10.10 to 11.04 and have the same issue. Just after the login the OS freezes and does not respond to keyboard or mouse movements. As a work around i booted in failsafe X mode and selected Ubuntu classic (no effects) and currently I am able to login. My video card is Nvidia FX 5500.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/769911 Title: System freeze after login in 11.04 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs