I have experienced the same issue. Logging in remotely still works, and will show Xorg at 100% CPU utilization. It seems to be related to the nvidia driver.
My card: VGA compatible controller: NVIDIA Corporation GF106GL [Quadro 2000] (rev a1) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1179583 Title: Xorg freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/1179583/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
