I have an IdeaPad G560 and it has a bunch of LEDs on the keyboard. I would like to use some of these. Where should I look for files controlling these? There's no led directory in /proc/acpi (where it was on my previous laptop, in the asus directory) or in /sys/class.
Check out a program called
At least on my Poweredge 2500 server, the leds are controlled through the console driver.
May I suggest you start here:
Or the direct link here (no signup needed)
See page 13.