Lenovo ThinkPad X1 Carbon (Gen 7) tpacpi::kbd_backlight workaround

README.md

Usage

$ usermod -aG user input

add this script to autostart

Requirements

• libinput
• light

License

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

kbdlight.sh

#!/usr/bin/env bash

DEVICE="sysfs/leds/tpacpi::kbd_backlight"
LIGHTLEVEL=(0 1 2)

kbdlight_set ()
{
  light -r -s "${DEVICE}" -S "$1"
}

kbdlight_get ()
{
  light -r -s "${DEVICE}" -G
}

kbdlight_toggle ()
{
  CURRENT=$(kbdlight_get)

  # Get the next light level (wrapped)

  for ((i = 0; i < ${#LIGHTLEVEL[@]}; i++)); do
    if [[ ${LIGHTLEVEL[$i]} -eq $CURRENT ]]; then
      NEXT=${LIGHTLEVEL[$((i + 1)) % ${#LIGHTLEVEL[@]}]}
      break
    fi
  done

  kbdlight_set "$NEXT"
}

while read -r line; do
  if [[ $line == *"KEY_KEYBOARD (374) released"* ]]; then
    kbdlight_toggle
  fi
done < <(stdbuf -oL libinput debug-events --device /dev/input/by-path/platform-thinkpad_acpi-event &)

ok i guess i'm kinda dumb on this one. the backlight toggle key combination is Fn+Space.