I can't change any settings inside Screen Lock
portion as they are grayed out. Settings options for other categories seems okay.
How can I fix this ?
1 Answer
I found the answer at Ubuntu 18.10: Screen lock options grayed out
In short, you can remove the "lockdown" of this setting by using the command
gsettings set org.gnome.desktop.lockdown disable-lock-screen false
dconf reset -f /
(THIS RESETS ALL YOUR SETTINGS)