Next time the problem starts please open a Terminal window and run: journalctl -b0 > curboot.txt
Or if you had to reboot then instead run: journalctl -b-1 > prevboot.txt and attach the resulting text file here. Also, while the problem is happening, does 'top' show any process using high CPU? ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: 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/1913453 Title: Xorg freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1913453/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs