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My lock screen option from settings is gone, and neither Windows+L nor Ctrl+Alt+L are locking the screen - they are simply turning it off. When I move the mouse, no password is prompted for before resuming operation.

How can I restore the missing locking functionality?

Using Ubuntu 17.10.

1 Answers1

8

try this:

    gsettings set org.gnome.desktop.lockdown disable-lock-screen false
Gildo
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