If I lock using Super+L, my screen is locked. However, if the screen remains locked for too long, when I come back I drag up to type in my password, my password is never requested and the screen is completely unlocked.
As well as that, the screen blanks out if I don't move my mouse every 30 seconds or so.
11 Answer
About screen Lock you can change it in Settings->Privacy->Screen Lock. Also if you want Password on every Login, then you need to change it in Settings->Details->User->Automatic Login set to off.
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