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I do change the Turn screen off when incative for: often using the below screen in Ubuntu 12.04. How do I change the same from the terminal? I did check in the gconf-editor, but couldn't figure it out.

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I use the below commands for turning the monitor off and for the locking the screen quickly from the terminal.

alias off='xset dpms force off'  
alias lock='gnome-screensaver-command -a'
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2 Answers 2

up vote 2 down vote accepted

You can change the time of inactivity after which to turn the screen off from terminal using next commands:

gsettings set org.gnome.settings-daemon.plugins.power sleep-display-ac <nr_of_sec>
gsettings set org.gnome.settings-daemon.plugins.power sleep-display-battery <nr_of_sec>
gsettings set org.gnome.desktop.session idle-delay <nr_of_sec>

Change <nr_of_sec> as you wish. For example, for 3 minutes, use 3x60=180:

gsettings set org.gnome.settings-daemon.plugins.power sleep-display-ac 180
gsettings set org.gnome.settings-daemon.plugins.power sleep-display-battery 180
gsettings set org.gnome.desktop.session idle-delay 180

If you will use 0, the screen will never turn off.

Source: http://askubuntu.com/a/313155/147044.

To change the brightness through terminal, use this answer: http://askubuntu.com/a/56171/147044. I tested this method on 13.04 and is working.

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How about the brightness controls? –  Seth Jun 27 '13 at 17:00
    
@Seth See askubuntu.com/a/56171/147044 –  Radu Rădeanu Jun 27 '13 at 17:27
    
Is there any list of all the different properties for gesettings. I will try it out and upvote. –  Praveen Sripati Jun 28 '13 at 1:02
    
@PraveenSripati See man gsettings. –  Radu Rădeanu Jun 28 '13 at 6:11
    
Only idle-delay is needed on a desktop machine. Tested on 14.04.1 –  Antonios Dec 3 at 17:41

You can use

xrandr --output LVDS1 --brightness "X"

Where X is a number between 1 (being full brightness) and 0 (with the backlight off) :)

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