Please: 1. Follow these instructions in case it was the shell crashing and restarting: https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment
2. Reproduce the freeze again and then immediately after it run: journalctl -b0 > postfreeze.txt lspci -k > lspcik.txt and attach the resulting two text files. 3. Take a video of the freeze using a phone if you can, and attach it here. ** Changed in: gnome-shell (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/1878613 Title: UI freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1878613/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs