The problem with idle dimming enabled would be when the user stops being idle. The brightness would be "reset" to whatever g-p-m thinks the brightness is (100% by default), instead of what it was actually set to using the fn keys.
The problem with idle dimming enabled would be when the user stops being idle. The brightness would be "reset" to whatever g-p-m thinks the brightness is (100% by default), instead of what it was actually set to using the fn keys.