Sudev Ambadi

I'm a computer enthusiast interested in exploring Free and Open software, operating systems, cloud computing, programming and cricket.

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Permanently adjust screen brightness in Ubuntu / Linux Mint

This is a fix to adjust the screen brightness in Ubuntu / Linux Mint during each boot automatically.
This idea will work only if you have a file named brightness in the folder /sys/class/backlight/acpi_video0

To know your systems current brightness level.

cat /sys/class/backlight/acpi_video0/brightness

Change brightness by changing the value

echo 0 > /sys/class/backlight/acpi_video0/brightness

To permanently set the brightness you can use the rc.loacal script file to change brightness which is executed at each reboot

sudo gedit /etc/rc.local

add the following line above “exit 0” seen at the bottom of the document

echo 0 > /sys/class/backlight/acpi_video0/brightness

restart your system after saving the file.



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