Power Off Display on Lid Close (NOT suspend!)

[dabgdk]

I want my LCD backlight to turn off when I close the lid of my laptop, while leaving the laptop running.

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xset -display :0.0 dpms force off


That command does exactly what I want.

I currently have "HandleLidSwitch" set to "ignore" in /etc/systemd/logind.conf - is there a way to set it to "script"? Could I make a script under "/etc/systemd/system/"?

[Head_on_a_Stick]

I currently have "HandleLidSwitch" set to "ignore" in /etc/systemd/logind.conf

That method works for my Openbox/tint2 desktop (with no other power management solutions running).

Please post the full, exact contents of /etc/systemd/logind.conf so that we can check the file for errors.

Here is my version, this works for me:

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Helium: ~ $ 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%

Did you remember to remove the comment when you changed the HandleLidSwitch line?

Please also post the output of:

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systemd-inhibit

[dabgdk]

/etc/systemd/logind.conf

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#  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.
#
# See logind.conf(5) for details

[Login]
#NAutoVTs=6
#ReserveVT=6
#KillUserProcesses=no
#KillOnlyUsers=
#KillExcludeUsers=root
#InhibitDelayMaxSec=5
#HandlePowerKey=poweroff
HandlePowerKey=suspend
#HandleSuspendKey=suspend
#HandleHibernateKey=hibernate
HandleLidSwitch=ignore
#PowerKeyIgnoreInhibited=no
#SuspendKeyIgnoreInhibited=no
#HibernateKeyIgnoreInhibited=no
#LidSwitchIgnoreInhibited=yes
#IdleAction=ignore
#IdleActionSec=30min
#RuntimeDirectorySize=10%
#RemoveIPC=yes


systemd-inhibit

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0 inhibitors listed.


Ran as root, and then again as regular user.

If I close the lid, my display remains on (suspend does not occur, which is good- but I want the backlight to turn off).

[Head_on_a_Stick]

If I close the lid, my display remains on (suspend does not occur, which is good- but I want the backlight to turn off).

Have you tried

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xfce4-power-manager-settings

Then:

General → Laptop Lid → When laptop lid is closed → Switch off display

[dabgdk]

Command not found. (Probably because this is LXDE).

Should I install xfce4-power-manager-settings?

[Head_on_a_Stick]

this is LXDE

Damn, my crystal ball must be broken...

Use the power management tools of that desktop then, perhaps?

[GarryRicketson]

I am not familiar with LXDE either, all though I have heard of it.
Some search results show,..

https://www.startpage.com/do/search/do/?q=%20power%20management%20tools%20fo%20LXDE

from: https://wiki.mageia.org/en/First_step_with_LXDEPower Management
(For Laptops) No one
But it is possible to install one from third parties

[debiman]

Should I install xfce4-power-manager-settings?

thankfully most xfce components are modest in dependency requirements and can be used without installing the full desktop, so yes, you can, if LXDE doesn't have its own.

[dabgdk]

I destroyed that install trying to setup NVIDIA drivers. Boot brings me to shell.

Thanks for your help.

[Head_on_a_Stick]

I destroyed that install [...] Boot brings me to shell.

Sounds perfectly serviceable to me

Why not just re-configure your graphics stack? It would be quicker than re-installing.

[debiman]

https://wiki.debian.org/NvidiaGraphicsDrivers