From f63dc663a62b2858d17cba49640f73928507037a Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 21 Dec 2023 16:42:38 +0100
Subject: [run-virt] Run xfce4-power-manager if we have a backlight

---
 .../openslx/scripts/start-useful-session-daemons   | 24 ++++++++++++++++++++++
 .../run-virt-includes/start_windowmanager.inc      |  4 ++++
 2 files changed, 28 insertions(+)
 create mode 100755 core/modules/bwlp-desktop-tweaks/data/opt/openslx/scripts/start-useful-session-daemons

diff --git a/core/modules/bwlp-desktop-tweaks/data/opt/openslx/scripts/start-useful-session-daemons b/core/modules/bwlp-desktop-tweaks/data/opt/openslx/scripts/start-useful-session-daemons
new file mode 100755
index 00000000..bdbc253d
--- /dev/null
+++ b/core/modules/bwlp-desktop-tweaks/data/opt/openslx/scripts/start-useful-session-daemons
@@ -0,0 +1,24 @@
+#!/bin/sh
+
+# Check environment
+
+file="/sys/class/backlight/intel_backlight/max_brightness"
+if ! [ -e "$file" ]; then
+	for file in /sys/class/backlight/*/max_brightness; do
+		break
+	done
+fi
+have_backlight=false
+[ -e "$file" ] && have_backlight=true
+
+#
+# Run daemons
+#
+
+# xfce4-power-manager
+
+if $have_backlight; then
+	xfce4-power-manager &
+fi
+
+exit 0
diff --git a/core/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/start_windowmanager.inc b/core/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/start_windowmanager.inc
index f73a34be..556aafd3 100644
--- a/core/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/start_windowmanager.inc
+++ b/core/modules/run-virt/data/opt/openslx/vmchooser/run-virt-includes/start_windowmanager.inc
@@ -93,6 +93,10 @@ start_wm() {
 		declare -g RUNVIRT_TASKBAR_PID="$!"
 	fi
 
+	# This script conditionally runs useful stuff, like xfce4's power manager that can handle
+	# backlight control keys, in case it sees there is a backlight
+	/opt/openslx/scripts/start-useful-session-daemons
+
 	if isempty HAVE_WM_CLEANUP_HOOK; then
 		add_cleanup stop_wm
 		declare -rg HAVE_WM_CLEANUP_HOOK=yes
-- 
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