So on my ASUS laptop (Q501LA), I can adjust the keyboard backlight with the hotkeys just fine, but the backlight seems to behave opposite to what you would expect - in a dark environment (like a room with the lights off/dim), the backlight turns on when I adjust it, but then fades. However, when I turn on the backlight in a bright room, the keyboard backlight stays on.
I guess it's an ambient light sensor, but right now the keyboard backlight is kinda useless. When I can see the keys fine, it'll illuminate. When I'm in the dark and can't see my keys as well, the backlight refuses to stay on.
I can't seem to find any info on this happening, any ideas?