I setup a fresh install of Manjaro Cinnamon for a friend and set autologin at install. I now want to revert it to the login prompt but for the life of me cannot find how to do this. I have removed the user from the autologin group in ‘Users and Groups’ inside system settings. I have also tried Allow Manual Login, again inside system settings in ‘Login Window’.
@omano is correct, edit the lightdm.conf file and scroll down to autologin-user=
you should see this entry with the user name that is currently logging in automatically. Just add the “#” at the beginning of the line and restart.
However, editing the lightdm.conf as suggested above seems consistent with what I recall from using LightDM with both Cinnamon and LXQt in days gone by.