I had to completely remove the fglrx, removed xorg.conf, rebootet with opensource radeon driver, and than I did a fresh install with jockey, this solved the problem.
It looks like a problem with the upgrade procedure, the fglrx kernel module was not build -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/763130 Title: X hangs at startup (segfault in fglrx?) after Natty beta upgrade -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs