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Tags: power-management   16.10   lock-screen  
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Title: How do I prevent my display from turning off when screen is locked?
ID: /2017/03/09/How-do-I-prevent-my-display-from-turning-off-when-screen-is-locked_
Created: March 9, 2017    Edited:  February 21, 2018
Upload: November 24, 2022    Layout:  post
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Quite by accident tonight I discovered a β€œhack”. Enter an invalid password at the lock screen and it will stay there and not fade to black.

I’ll be using this technique myself from now on until a better answer comes along. The duplicate candidates don’t work for me under Ubuntu 16.04 and like yourself it irritates me the screen turns off.

Feb 20 2018 Update - Disable Dimming CLI method

To prevent screen from turning off you need two settings, one under battery power the other when plugged into wall outlet (A/C).

For battery timeout:

gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout <time_in_seconds>

For AC timeout:

gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout <time_in_seconds>

So for both Battery and A/C set the time to 0 (never).

For Login screen:

gsettings set org.gnome.desktop.screensaver idle-activation-enabled false

Disable dimming screen when idle:

In Unix & Linux someone complained when on battery screen dims every 20 seconds and wants to turn that feature off:

gsettings set org.gnome.settings-daemon.plugins.power idle-dim false
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