I just discovered a small tool which fixes the Boot Camp keyboard backlight drivers... It basically allows the user to turn off keyboard leds completely or turn off Boot Camp's poor auto-adjustment, without a need to kill bootcamp.exe
You might ask, what's the question? OK, I'd like to know is it possible to somehow turn Macbook keyboard backlight off WITHOUT using this 3rd-party tool... Does anyone know is it a registry fix, driver command or something else?
I'm not a hardcore software developer, but after some analysis I would say it's a complex thing. Looks like this application drives Apple System Management Controller directly, through the raw driver... So forget registry fixes