Thanks but those crashes in xscreensaver-data-extra and nautilus don't appear to be relevant.
Instead, next time the system freezes please: 1. Wait 10 seconds. 2. Reboot. 3. Run: journalctl -b-1 > prevboot.txt 4. Attach the resulting text file here. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1937321 Title: System freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1937321/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs