I am able to change brightness manually by issuing the command:
echo 512 | sudo tee - /sys/class/backlight/intel_backlight/brightness
This changes the brightness output of my Intel integrated GPU on my laptop. However, this laptop also has a dedicated NVIDIA video card which also has a backlight section:
The problem is that when I change the brightness using the brightness changing hotkeys, Plasma (or whatever program is responsible for changing brightness) thinks it should change the brightness in the nvidia_0 section of the backlight instead of the intel_backlight. How do I fix this? BTW I'm running Arch Linux.