I have the same problem with my macbook pro 7.1
I can't stop the back-light with F55 or the command line: echo 0 | sudo tee -a /sys/class/leds/smc\:\:kbd_backlight/brightness
but, after 60sec, if i didn't touch the keyboard, the back-light turn off.
If i can help in any case...
I have the same problem with my macbook pro 7.1
I can't stop the back-light with F55 or the command line: leds/smc\ :\:kbd_ backlight/ brightness
echo 0 | sudo tee -a /sys/class/
but, after 60sec, if i didn't touch the keyboard, the back-light turn off.
If i can help in any case...