Brightness settings from terminal

Question

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.

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'

Solution 1

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: https://askubuntu.com/a/313155/147044.

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

Solution 2

You can use the following.

xrandr --output <output name> --brightness "<X>"

Where <X> is a number between 1 (being full brightness) and 0 (with the backlight off) and <output name> can be obtained with xrandr --listmonitors ("LVDS1" or "LVDS-1" may work). :)

Comments

[web.learner]

How about the brightness controls?

[Radu Rădeanu]

@Seth See askubuntu.com/a/56171/147044

[Praveen Sripati]

Is there any list of all the different properties for gesettings. I will try it out and upvote.

[Radu Rădeanu]

@PraveenSripati See man gsettings.

[Antonios Hadjigeorgalis]

Only idle-delay is needed on a desktop machine. Tested on 14.04.1