So I can't find the screen brightness slider or any brightness adjustment option in my power plan options. All I can do is determine when to put the laptop to sleep and when to turn off the display.
It seems like the common solution for many was to go to Device Manager and uninstall the driver under Monitors, then scan for hardware changes. I did that and it didn't work. If it helps, under my Monitors section it says "Generic PnP Monitor".