Ubuntu – How to change the length of time the lock screen appears for

lock-screen

When my screen is locked and I then reawaken it, by moving the mouse or pressing the keyboard, the password entry screen appears. How can I change the amount of time that is taken before the password entry screen turns off?

To be specific:

I lock my screen Ctrl+Alt+T
Screen goes blank
Move mouse to bring up login screen
If I do nothing else the screen turns off again after 1 minute

In my Brightness and Lock settings I have the screen set to turn off and lock after 10 minutes, but I can't see a setting to determine how long it takes for the screen to turn off after the lock screen has been woken. It seems to be set to 1 minute by default, can this be increased/reduced?

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Best Answer

Ubuntu 17.04 and earlier (Unity)

Open System Settings, click Brightness & Lock and select a value for the screen turn off option, Turn screen off when inactive for:

screenshot

Choose your time delay in the drop-down menu.

Ubuntu 17.10+ (Gnome Shell)

Check this question.

Related Solutions

Ubuntu – How to put the display to sleep on screen lock

The following script will check every ten seconds to see if the screensaver is enabled, and if it is, turn of the display using the command xset dpms force off.

It also checks to make sure it didn't already turn off the display, so you can unlock the screen without the monitor turning off while you are typing your password.

#!/bin/bash 

ALREADY_SHUTOFF="yes"

while true; do

    if (gnome-screensaver-command -q | grep "is active");
    then

        echo $ALREADY_SHUTOFF
        if [ "$ALREADY_SHUTOFF" == "no" ];
        then

            # this command turns off the display
            xset dpms force off
        fi


        ALREADY_SHUTOFF="yes"

    else

        ALREADY_SHUTOFF="no"
    fi

    sleep 10

done

Ubuntu – How to prevent the display from turning off when screen is locked

Quite by accident tonight I discovered a "hack". 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