Firstly, I have gone through the uncountably many threads on screen brightness to make sure this is not a repost.
I have a desktop with i5 and I'm using the integrated graphics. Adjusting the brightness in the "Brightness and Lock" setting in the settings menu does not change my brightness and I was wondering what could be the reason and what I can do to achieve different brightness levels on my desktop.
I have looked at and followed the instructions in the following whenever they seem relevant
Also tried to edit grub to include a lone about setting something to vendor (can't find the thread) but did not work. I assume there is something fundamentally different about changing brightness in a desktop as opposed to a laptop, I'd just like to know how to sort it out.