Brand new Manjaro XFCE, fresh out of the box.
I run a setup with a laptop as the base of a monitor; the laptop stays shut and gives me a single-screen monitor setup.
I go to the XFCE options and
When the laptop is closed, switch off the display. Don't lock, don't do anything more.
I ran power manager with sudo and it's not running there, only through the interface.
Upon restart it functions as intended until a moment on the desktop and then it locks.
The intent is to just switch off the display. Automatic locks are disabled.
Edit: Will reboot with
HandleLidSwitch=ignore in /etc/systemd/logind.conf
IgnoreLid=true in etc/UPower/UPower.conf