My CentOS 7.5 VM pops up a blank screen after that is left unused for some time (~15 minutes). When the mouse is moved, it shows a clock in the middle of the screen and requests a password to unlock. This although all settings say otherwise:
Settings -> Power -> Power Saving -> Blank screen: Never
Settings -> Power -> Power Saving -> Suspend -> Automatic suspend: Off
Settings -> Privacy -> Screen Lock: Off
Is there any other setting to change?
GNOME version is 3.25.4.