I am running Peppermint 3 on a Dell D505 which I installed to boot without needing my password.
I needed to add a temporary user, which was easy enough, and I set the log-in requirements for both accounts to be “needs password at log-in”, expecting the basic Peppermint screen to be displayed at reboot with a choice of users. But the PC boots straight into my administrator’s account without even asking for my password.
I found the file /etc/login.defs which defines many conditions for the log-in procedure but could not find anything relevant to this problem. Perhaps I have missed something in the Menu. Any ideas?