I'm using linux mint with Cinnamon. The login screen comes to type a username but it also displays that in 10 seconds userx will be automatically logged in.
And it happens.
How to make it wait indefinitely?
Open 'Menu' > 'Login Window' to open the Login Window Preferences. Select the 'Security' tab > uncheck the 'Enable Automatic Login' option.
To me, disabling "Enable Automatic Login" in "Auto Login" tab from Login Window Preferences wasn't enough (login screen was showing up, but a moment later system was automatic logging me). I had to uncheck also "Enable Timed Login" from the same section.
That was not enough. For some weird reason Mint added a user by default to the
nopasswdlogin group and no mater how long you play with the settings above, that user will not be challenged for a password.
Solution: Go to Menu > Administration > Users and Groups and remove that user from the
In Mint 17/18 you need to go to
Users and Groups, select the user in question from the menu on the left, then next to "Password" on the right, click "Change..." and make sure "Don't ask for password on login" is unchecked.
In Mint 16 Petra you need to turn on time delay for nopasswlogin user.