OK! I got the solution. I changed my graphic drivers from NVIDIA accelerated graphics driver (version current) [Recommended] to NVIDIA accelerated graphics driver (version 173)
And then I restarted my pc and everything worked fine! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/809668 Title: System hangs on startup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/809668/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
