Solve Brightness problem on linux.

In Linux machines has some problem with brightness. every-time when we restart the computer the brightness level will be at its maximum or minimum and then we need to manually set the brightness to a comfortable level.

To solve this issue here I share a small script.

First install xdotool

sudo apt-get install xdotool

This will allow you to change the brightness easily from the command line without root privileges.

Check whether the brightness is changing with the following command

              xdotool key XF86MonBrightnessUp   (For maximizing brightness).

xdotool key XF86MonBrightnessDown  (For minimizing brightness).

Now we have to find the file where the brightness value is stored, try doing

cat /sys/class/backlight/acpi_video0/brightness

If you get an integer value then your good to proceed, else you have to find the appropriate file in your system. In that case check in /sys/class/…

Adjust the brightness and find your desired brightness level using the above command E.g: 5

In this example I have used 5 as my brightness level change it according to you.

For Maximum Brightness:

1.       #!/bin/bash
2.  
3.       myBrightness=5;
4.       currentBrightness=`cat /sys/class/backlight/acpi_video0/brightness`;
5.       count=$(( $currentBrightness - $myBrightness )) ;
6.       while [ $count -gt 0 ]
7.       do
8.            xdotool key XF86MonBrightnessDown
9.            let  count=$(($count-1));
10.       done