On "Startup Applications" utility I added my suitable brightness to be configured each time OS is launched. But it is not working at all. I am having to bear system's very high default brightness.

the command is : xrandr --output LVDS1 --brightness 0.5

Startup Applications is very fine although. I have also added up firefox opening command which is opening it well.

This brightness command is working from terminal. How do i make it work from startup App ? Thanks in advance.


install indicator-brightness 'bar for brightness control'

$ sudo add-apt-repository ppa:indicator-brightness/ppa
$ sudo apt-get update
$ sudo apt-get install indicator-brightness


make it start on boot
install $ sudo apt-get install xbacklight

open the 'Startup Applications' then and add a 'new startup item' with the command:

xbacklight -set 40

40 is the brightness lvl
from 1 => 100

don't use them both


To set-up a predefined brightness on Ubuntu startup, type in the following command:

sudo gedit /etc/rc.local

There add this line:

echo X > /sys/class/backlight/intel_backlight/brightness

just before exit 0.

BE SURE not to place a value too low in place of X otherwise you will get a black screen.

Put values like 50, 75(my default value), etc.


You can create a executable text file and run that at startup. Open gedit, paste that line(command) and save it. Give the file executable permissions. now add file to the start up list.

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