It sounds like some part of the system has crashed. Please: 1. Apply the workaround from bug 994921.
2. Look in /var/crash for crash files and if found run: ubuntu-bug YOURFILE.crash and tell us the ID of the newly-created bug. 3. If step 2 failed then look at https://errors.ubuntu.com/user/ID where ID is the contents of the /var/lib/whoopsie/whoopsie-id file on the machine. Do you find any links to recent problems on the machine? If so then please send them to us. ** Summary changed: - Xorg freeze + [GeForce GTX 960M] Xorg freeze ** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu) ** Tags added: nouveau nvidia ** Changed in: xorg-server (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1780853 Title: [GeForce GTX 960M] Xorg freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1780853/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs