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Accepted
Kalle Elmér
Asked: 2012-09-05 13:01:01 +0800 CST

Disable blank screen in 12.04

  • 772

After my computer with ubuntu 12.04 has been idle for a short while, the screen will go blank, and even enter standby mode. I have tried this:

  1. System Settings -> Brightness and Lock -> Turn off screen... set to "Never"
  2. System Settings -> Power -> Suspend when... set to "Don't suspend"

This doesn't change anything.

How can I make sure that the screen will always remain on, forever?

12.04

5 Answers

  1. Best Answer

    Try opening a terminal with Ctrl+Alt+T and then enter the following:

    gconftool-2 --type bool --set /apps/gnome-screensaver/idle_activation_enabled "false"
    • 7

  2. You can install the dconf-tools package and then run dconf-editor.

    In dconf-editor, open up the "org" branch, then "gnome" then "desktop" then "screensaver" and you'll see the name-value pairs that set the various screensaver properties.

    Change "idle-activation-enabled" to unchecked.

    You could also uncheck "lock-enabled" while you're there to prevent it demanding your password when it's been idle too long.

    However this might not work! It didn't work for me when I was trying and I can only assume that there is a bug somewhere in xfce4, which is the windows manager I installed on 12.04 instead of Unity. If you also suffer problems, the work-around is to use xset:

    xset -dpms s off s noblank s 0 0 s noexpose

    but that only lasts as long as your session.

    You can use 

    xset -q

    to see what the current settings are. It basically overrides the settings in /etc/X11/xorg.conf

    You would have to put it into your .profile to re-apply it every session.

    • 6

  3. managed to fix it by putting: "@xset s off" in my autostart file (after all other programs) and setting session idle timeout to its max value in dconf-editor

    • 1

  4. the only way I could stop the blank screen was to install xscreensaver which will then let you disable the gnomescreensaver daemon you can also remove the gnome-screensaver

    then set xscreensaver to 'no screen saver'

    to have xscreensaver start at log on open startup applications then add

    name = xscreensaver

command = xscreensaver -nosplash

    then save the settings ...

    • 0

  5. I tried the selected answer as well as:

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

    Both did not solve the issue with me. I found this that ended up working. I'm sure there is some configuration option that would have solved the issue without me having to remove the package entirely, but I didn't feel like spending too much time on it.

    sudo apt-get remove acpi-support acpid
    • 0