Systemd-logind

External

• http://www.freedesktop.org/software/systemd/man/logind.conf.html

Internal

• Linux Power Management

Overview

systemd-logind is a system service that manages user logins. It is responsible for:

• keeping track of users and sessions, their processes and their idle state
• providing PolicyKit-based access for users to operations such as system shutdown or sleep
• implementing a shutdown/sleep inhibition logic for application
• handling power/sleep hardware keys
• multi-seat management
• session switch management
• device access management for users
• automatic spawning of text logins (gettys) on virtual console activation and user runtime directory management

How to Prevent the Computer to Go to Sleep when the Lid is Closed

Edit /etc/systemd/logind.conf.

Set the following:

...
HandleLidSwitch=ignore
HandleLidSwitchDocked=ignore
...
LidSwitchIgnoreInhibited=yes
...

"LidSwitchIgnoreInhibited=yes" must be set explicitly, so our "HandleLidSwitch=ignore" configuration is executed in any case, and it is not subjected to "inhibitor locks taken by the application".