I'm troubleshooting a fn-key brightness control problem on my laptop, so I'm wading through a lot of config options in /etc/default/grub, as you can imagine. However, it's raised a question for me:
What's the difference between the lines marked
For example, does
behave any differently than
As an unrelated question, what do any of them have to do with mapping the use of my fn keys? The brightness is already adjustable in System Settings due to some
xorg.conf.d/ magic. I just wanna make the keys work.