ASUS KeyBoard Backlight : Some Comments

asus_kbd.md

ASUS TUF Keyboard Backlight Not Working on Ubuntu

I'm facing this exact issues on my ASUS TUF FX505.

• The keyboard function keys don't work: FN + <Up>, FN + <Down>
• /sys/class/leds/ (how linux kernel handles leds) does not have a corresponding device:

~[/sys/class/leds]$ tree .
.
├── asus-wireless::airplane -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ATK4002:00/leds/asus-wireless::airplane
├── input4::capslock -> ../../devices/platform/i8042/serio0/input/input4/input4::capslock
├── input4::numlock -> ../../devices/platform/i8042/serio0/input/input4/input4::numlock
└── input4::scrolllock -> ../../devices/platform/i8042/serio0/input/input4/input4::scrolllock

• xset led <n> does not work, either.
• $ sudo /etc/acpi/asus-keyboard-backlight.sh does not work because this script looks for a non existent device:

...
KEYS_DIR=/sys/class/leds/asus\:\:kbd_backlight`
...