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Asked: 2020-12-13 09:29:17 +0800 CST

How to disable suspend on Ubuntu 20.04 (systemd) via CLI

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I have a laptop that has been installed with ubuntu 20.04 that is being used as a server. Thus I want it to never suspend.

By default it automatically suspends when the lid is closed.

As I can only access it via ssh (and there is no X installed anyway) I need to disable it via the CLI.

Multiple sites suggest using

sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target

This does indeed stop the laptop from suspending while the lid is closed, but results in systemd-logind consuming 100% cpu and continuously logging the following: (multiple times per second)

 systemd-logind[514]: Suspending...
 systemd-logind[514]: Unit suspend.target is masked, refusing operation.
 systemd-logind[514]: Failed to execute suspend operation: Permission denied

Can anyone tell me how to properly disable suspending?

ubuntu systemd suspend

1 Answers

  1. After some more searching, I found the correct answer:

    In /etc/systemd/logind.conf add the following lines at the bottom:

    HandleSuspendKey=ignore
HandleHibernateKey=ignore
HandleLidSwitch=ignore
HandleLidSwitchExternalPower=ignore
HandleLidSwitchDocked=ignore

    and run

    systemctl restart systemd-logind

    to activate the new settings.

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