I’m unable to lock the screen. I’m using a default Gnome desktop installation.
Pressing Super+L does not lock the screen.
There is no lock button on the menu and no lock option in the “Power Off/Log out” menu.
I found a similar report here but the gconf settings on my system appear to be correct:
$ gsettings get org.gnome.desktop.screensaver lock-enabled
true
$ gsettings get org.gnome.desktop.lockdown disable-lock-screen
false
I have tried to enable the disable-lock-screen and reset it:
$ gsettings get org.gnome.desktop.screensaver lock-enabled
true
$ gsettings set org.gnome.desktop.lockdown disable-lock-screen false
$ gsettings get org.gnome.desktop.lockdown disable-lock-screen
false
The problem occurs both in an X11 and a Wayland Gnome session.
Additional information:
I reinstalled Fedora to upgrade from Fedora 27. During the upgrade I have preserved my home dir and some other partitions. I did reformat the / and /var partitions.
Can you please confirm what login manager you are using? I think you must use gdm for lock screen to work. Are you using gdm?
If yes, can you create a new user and see if the lock screen works there? if it does, it’s some other user specific configuration that’s messing it up.
I concur with @ankursinha .
You said you upgraded by a reinstall from F27 but retained the /home content. It is possible that something in your users home directory is interfering with the lock screen so the test by creating a new user will verify if that is true or not.
I played a bit on my system with systemd-inhibit, probably after this, I had also the issue that I could not lock my screen any more.
However disable-lock-screen was true in my case:
$ gsettings get org.gnome.desktop.lockdown disable-lock-screen
true
Setting it to false fixed the issue:
$ gsettings set org.gnome.desktop.lockdown disable-lock-screen false
IIRC Automatic Screen Lock was on all the time in GNOME Settings.