Ignore the action of lid

You can choose the action in the system settings when you close the lid of you laptop/notebook computer while you are logging on.

Nevertheless, your PC may be suspended when you close the lid of it while you have logged off.

However, you can avoid it.

$ grep Lid /etc/systemd/logind.conf

#HandleLidSwitch=suspend

#HandleLidSwitchDocked=ignore

#LidSwitchIgnoreInhibited=yes

Copy the first line, comment out it, and change the "suspend" to "ignore" by the following command.

$ sudo gedit /etc/systemd/logind.conf

or

$ sudo vi /etc/systemd/logind.conf