Wasn't sure how to control my screen brightness from the terminal but I knew the graphical desktop could control my brightness, so I searched how to control it that way using the dbus interface. Has the side-benefit that you could trigger graphical effects when the brightness level changes from a Bash script (i.e., have an icon of a lightbulb pop up) Using this assigned to hotkeys until I can actually get my fn keys to work :P

@brianna if you want a prebuilt binary, I use `light`, which lets you step brightness up/down however you want. i have `light -A 10` and `light -U 10` on my brightness up/down keys and it works great.

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