[FIX] Brightness Keys Not Working on a Notebook/Laptop – Ubuntu/Linux Mint

In this tutorial, we will see a solution that may render your brightness keys workable again in a laptop/notebook running Ubuntu/Linux Mint.

Before starting, you should bear in mind that this solution is not meant to fix all laptop or notebook models and is dedicated for users of intel cards for adjusting brightness levels. Also, this tip is only workable on Ubuntu/Linux Mint with GRUB 2.
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