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 Desktop Packages, which is subscribed to gnome-control-center in 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. Status in gnome-control-center package in Ubuntu: Incomplete Bug description: I upgraded from 18.04 to 20.04.1 and the screen doesn't lock or go blank at the set time. I think this issue also effects the shortcuts not working also. I'm using nemo as my file manager I followed these instructions below https://itsfoss.com/install-nemo-file-manager-ubuntu/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1898153/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
