HowTo Prevent A Laptop Lid Close Suspension

Overview

This page demonstrates how one can shut the lid of a laptop computer running NST and still have NST run without being suspended. This is especially useful when NST is booted in console mode. The systemd-logind.service can be configured to "ignore" the suspension system power action. This systemd service handles various hardware state system power functionality.

Edit Configuration File for systemd-logind.service

The systemd-logind.service has a configuration file: "/etc/systemd/logind.conf" that contains an entry for controlling the system power when the lid switch is in the Closed position. If one wants to allow an NST system running on a laptop computer not to enter the Suspension power state, then the HandleLidSwitch entry needs to be set to: "ignore".

The HandleLidSwitch entry is set to: "ignore" in the listing below for file: "/etc/systemd/logind.conf"

[root@shopper2 ~]# cat /etc/systemd/logind.conf 
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See logind.conf(5) for details.

[Login]
#NAutoVTs=6
#ReserveVT=6
#KillUserProcesses=no
#KillOnlyUsers=
#KillExcludeUsers=root
#InhibitDelayMaxSec=5
#HandlePowerKey=poweroff
#HandleSuspendKey=suspend
#HandleHibernateKey=hibernate
HandleLidSwitch=ignore
#HandleLidSwitchDocked=ignore
#PowerKeyIgnoreInhibited=no
#SuspendKeyIgnoreInhibited=no
#HibernateKeyIgnoreInhibited=no
#LidSwitchIgnoreInhibited=yes
#HoldoffTimeoutSec=30s
#IdleAction=ignore
#IdleActionSec=30min
#RuntimeDirectorySize=10%
#RemoveIPC=yes
#InhibitorsMax=8192
#SessionsMax=8192
#UserTasksMax=33%
[root@shopper2 ~]#