This was solved by running this command, recommended by frantou over at
the old AskFedora forum.
gsettings set org.gnome.desktop.lockdown disable-lock-screen false
I never messed with these settings, but this fix did work.
** Changed in: gnome-screensaver (Ubuntu)
Status: New => Invalid
This bug is also preventing the computer from blanking the screen after
inactivity.
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https://bugs.launchpad.net/bugs/1919084
Title:
Screen not locked when c
