Ubuntu Brightness issue resolved

With Ubuntu 14.04, by default there are no options to modify the brightness of the system. However there is an app for same called brightness controller. But I had problems setting up the brightness for the boot time itself. So I decided to find out how did the Brightness Controller work. I downloaded the source code from the git page and found out that internally it uses the Xrandr . So I added the Xrandr command to my bashrc file and now I don’t have to set the brightness every time.
jkapil@jkapil-desktop:~$ xrandr
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 32767 x 32767
VGA1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1366x768       60.0*+
1024x768       75.1     70.1     60.0
800x600        72.2     75.0     60.3
640x480        75.0     72.8     60.0
720x400        70.1
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

This gives you the output names associated with your display. In my case its VGA1. To set the brightness,

$xrandr --output VGA1 --brightness 0.7

–brightness value is in between 0 and 1 and is a fraction. First execute in terminal to find out the brightness value soothing to your eye and then put that value with the above command in your .bashrc file in home directory.

Ubuntu 12.04 brightness problem resolved

every time I start up my ubuntu 12.04, my laptop’s brightness always get reset to the maximum. I always keep the brightness to as minimum as possible. After some googling, i found this command line tool xbacklight which is pretty useful. command “xbacklight -set 50” reduce your brightness by 50%. just add this to your .bashrc file and u r good to go. To install xbacklight, do
sudo apt-get install xbacklight
[update]
sometimes adding this to .bashrc will not work. Try to add this command to “startup applications”.