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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  • May I know why do you want to change that option? Jul 7, 2013 at 13:36
  • I am about to go back to 13. I can't find a way to keep the machine from locking itself about every ten minutes. I am so over it.
    – user293278
    Jun 13, 2014 at 16:26
  • Not sure but this might be some of your help [ How to adjust screen lock settings on Linux desktop ](xmodulo.com/control-screen-lock-settings-linux-desktop.html) You might need to install dconf-editor Jan 9, 2015 at 10:58
  • 2
    @KhurshidAlam, May I answer for the asker? For example, when you work in two environments in one computer - Windows as a host machine and Ubuntu in VM. So sometimes Ubuntu locks your session when it is not desirable.
    – Green
    Aug 13, 2015 at 3:46
  • 1
    A maximum of 15 minutes before the screen blanks isn't a very long time. Would really like to see a 30 minutes or even 60 minute option. It's very annoying when the screen begins to blank in the middle of a video.
    – Matt
    Mar 7, 2018 at 1:54

5 Answers 5


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:


Choose your time delay in the drop-down menu.

Ubuntu 17.10+ (Gnome Shell)

Check this question.

  • 11
    this doesn't affect the length of time that the password entry screen appears for
    – coversnail
    May 28, 2012 at 15:42
  • How do I open System Settings? Can I script such a change with dconf? Feb 12, 2018 at 12:51
  • You didn't understand the question. The user wants to change the screen blank timeout for the gdm lock screen, which runs as the root user.
    – hackel
    Jan 24 at 15:28

You can not do that anymore in Gnome3.

In gnome2 you can change lock-screen timeout from gnome-screensaver settings.But In Gnome 3.2, gnome-screensaver doesn't exist, and screen locking is part of Gnome Shell.

They have reimplement some function, but not all. On Ubuntu you can access all power-related settings with dconf-editor from org.gnome.settings-daemon.plugins.power.


You can use x-screensaver as described here:

How can I change or install screensavers?


Just had the same problem but could not resolve the issue with the answer provided by Kurshid Alam. On Gnome 3.28 using dconf-editor:

The screen saver turns on automatically when the session is considered idle

org . gnome . desktop . screensaver . idle-activation-enabled

The easiest way to delay the screensaver is to increase the time limit for idle

org . gnome . desktop . session . idle-delay

Or using terminal

gsettings set org.gnome.desktop.session idle-delay $((15*60)) && \
gsettings set org.gnome.desktop.screensaver lock-delay 0 && \
gsettings set org.gnome.desktop.screensaver lock-enabled true

Beware of possible impacts on laptop battery charge due to other services affected by the idle status.


Settings -> Power -> disable dim screen when inactive & set blank screen to never

  • 2
    Welcome to Ask Ubuntu! Whilst this may answer the question it is not quite clear what this setting does exactly. Please elaborate your answer adding explanations.
    – dessert
    Nov 26, 2017 at 16:33

Press the windows button to get the unity search, then type lock in the search bar. Open brightness and lock and change the timeout.

  • 1
    this doesn't affect the length of time that the password entry screen appears for
    – coversnail
    May 28, 2012 at 15:41

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