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lid-power-manager.sh

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+#!/bin/bash
+
+EVENT=$1
+USER_NAME="your_user_name_here"
+USER_ID=$(id -u "$USER_NAME")
+USER_ENV_DIR="/run/user/$USER_ID"
+LOG="/tmp/lid-handler.log"
+SAVED_BRIGHTNESS_FILE="/tmp/keyboard_backlight_saved"
+BACKLIGHT_NAME="system76_acpi::kbd_backlight"
+
+export XDG_RUNTIME_DIR="$USER_ENV_DIR"
+export DBUS_SESSION_BUS_ADDRESS="unix:path=$USER_ENV_DIR/bus"
+
+run_user_cmd() {
+  sudo -u "$USER_NAME" XDG_RUNTIME_DIR="$XDG_RUNTIME_DIR" DBUS_SESSION_BUS_ADDRESS="$DBUS_SESSION_BUS_ADDRESS" "$@"
+}
+
+echo "$(date): Lid $EVENT" >>"$LOG"
+
+if [[ "$EVENT" == "close" ]]; then
+  # Save current backlight level
+  brightnessctl --device="$BACKLIGHT_NAME" get >"$SAVED_BRIGHTNESS_FILE"
+  # Set backlight to 0
+  brightnessctl --device="$BACKLIGHT_NAME" set 0
+
+  systemctl suspend
+
+elif [[ "$EVENT" == "open" ]]; then
+  # Restore backlight level if saved
+  if [[ -f "$SAVED_BRIGHTNESS_FILE" ]]; then
+    BRIGHTNESS=$(cat "$SAVED_BRIGHTNESS_FILE")
+    brightnessctl --device="$BACKLIGHT_NAME" set "$BRIGHTNESS"
+  fi
+
+  run_user_cmd notify-send "Welcome back!"
+fi