From e7c48367e88d09d4d31f5326b5ccc03290ed61dc Mon Sep 17 00:00:00 2001
From: Klesh Wong <klesh@qq.com>
Date: Thu, 2 Sep 2021 22:49:04 +0800
Subject: [PATCH] feat: display udev rules for laptop backlight

---
 gui/sysutils.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/gui/sysutils.sh b/gui/sysutils.sh
index d391f04..c939c1c 100755
--- a/gui/sysutils.sh
+++ b/gui/sysutils.sh
@@ -80,3 +80,14 @@ sudo systemctl start autorandr
 
 lnsf "$DIR/dunst/dunstrc" "$XDG_CONFIG_HOME/dunst/dunstrc"
 lnsf "$DIR/thunar/uca.xml" "$XDG_CONFIG_HOME/Thunar/uca.xml"
+
+echo for non-root user to change backlight, add following rule to /etc/udev/rules.d/backlight.rules
+echo ```
+echo ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="acpi_video0", GROUP="video", MODE="0664"
+echo ```
+echo for intel_backlight:
+echo ```
+echo RUN+="/bin/chgrp video /sys/class/backlight/intel_backlight/brightness"
+echo RUN+="/bin/chmod g+w /sys/class/backlight/intel_backlight/brightness"
+echo ```
+