If you're talking about "Dim Screen When Inactive", that option should only appear on laptops with backlights.
So I think the only problem here is that gnome-control-center is showing the option at all. It's not expected to work on desktops and/or external monitors. ** Package changed: xorg (Ubuntu) => gnome-control-center (Ubuntu) ** Also affects: mutter (Ubuntu) Importance: Undecided Status: New ** Changed in: gnome-control-center (Ubuntu) Status: New => Won't Fix ** No longer affects: mutter (Ubuntu) -- 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/1875639 Title: Settings/energy/screen saver ... it doesn't work. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1875639/+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