My #LinuxMint laptop will no longer turn on the keyboard backlight. I've tried things like 'xset led on' and setting an extra keyboard shortcut for KbdLightOnOff in Keyboard Settings. no luck.
My laptop is old, and maybe the backlight LED is fried. So:
Does anyone know a way to query what Linux *thinks* the LED state is? That'd help me figure out if my problem is software or hardware, at least.