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?
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