Turn off backlighting before sleep

So it cant keep the computer awake

bin/omarchy-hibernation-setup

@@ -59,9 +59,10 @@ echo "HOOKS+=(resume)" | sudo tee "$MKINITCPIO_CONF" >/dev/null
 
 # Configure suspend-then-hibernate
 echo "Configuring suspend-then-hibernate"
-sudo mkdir -p /etc/systemd/logind.conf.d /etc/systemd/sleep.conf.d
+sudo mkdir -p /etc/systemd/logind.conf.d /etc/systemd/sleep.conf.d /usr/lib/systemd/system-sleep
 sudo cp "$OMARCHY_PATH/default/systemd/lid.conf" /etc/systemd/logind.conf.d/
 sudo cp "$OMARCHY_PATH/default/systemd/hibernate.conf" /etc/systemd/sleep.conf.d/
+sudo cp -p "$OMARCHY_PATH/default/systemd/system-sleep/keyboard-backlight" /usr/lib/systemd/system-sleep/
 
 # Regenerate initramfs
 echo "Regenerating initramfs..."

default/systemd/system-sleep/keyboard-backlight

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Turn off keyboard backlight before hibernate to prevent hang on power-off.
+# The ASUS keyboard controller can block S4 shutdown if LEDs are active.
+
+if [[ $1 == "pre" && $2 == "hibernate" ]]; then
+  device=""
+  for candidate in /sys/class/leds/*kbd_backlight*; do
+    if [[ -e "$candidate" ]]; then
+      device="$(basename "$candidate")"
+      break
+    fi
+  done
+
+  if [[ -n "$device" ]]; then
+    brightnessctl -d "$device" set 0 >/dev/null 2>&1
+  fi
+fi