I switched display managers from lightdm to gdm and it fixed the issue sudo systemctl status display-manager
sudo dpkg-reconfigure lightdm systemctl status gdm.service sudo apt install --reinstall ubuntu-session reboot machine Info about the issue: https://bbs.archlinux.org/viewtopic.php?id=150017 https://askubuntu.com/questions/1245071/cant-lock-screen-with-shortcut- on-ubuntu-20-04-gnome -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1898153 Title: I upgraded from 18.04 to 20.04.1 and the screen doesn't lock or go blank at the set time. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1898153/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
