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.
Change brightness by changing the value
To permanently set the brightness you can use the rc.loacal script file to change brightness which is executed at each reboot
add the following line above “exit 0” seen at the bottom of the document
restart your system after saving the file.