Sounds like this may be bug 1724259 (fixed last night). Please try updating your system, make sure you then have libinput 1.8.4 installed, reboot and retest.
** Changed in: gdm3 (Ubuntu) Status: Confirmed => Incomplete ** Changed in: gnome-shell (Ubuntu) Status: Confirmed => Incomplete -- 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/1741839 Title: gdm3 lock screen/gnome-shell freeze after opening laptop lid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1741839/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs