Firstly, please run this command to send us more information from the machine:
apport-collect 1781826 Secondly, 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. ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete ** Tags added: nvidia -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1781826 Title: System logout when turn off the screen or suspend Ubuntu 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1781826/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs