This is *probably* bug 1877774 so wait until that fix is released for 20.04.
If the problem still happens after that then please follow these instructions: https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment ** Changed in: xorg (Ubuntu) Status: New => Incomplete ** Package changed: xorg (Ubuntu) => gnome-shell (Ubuntu) ** Summary changed: - Xorg freezes after Lock (win+L or via Menu>Lock) + Screen freezes (stays black) after Lock (win+L or via Menu>Lock) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1883334 Title: Screen freezes (stays black) after Lock (win+L or via Menu>Lock) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1883334/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp