From 23e2fc48e2fb374c8784d4b26790eba422d07937 Mon Sep 17 00:00:00 2001
From: Darren 'Tadgy' Austin <darren@afterdark.org.uk>
Date: Mon, 20 Nov 2023 12:50:14 +0000
Subject: [PATCH] Don't suspend on lid close.

---
 etc/.gitignore      |  1 -
 etc/acpi/.gitignore |  1 +
 etc/acpi/handler.sh | 97 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 etc/acpi/.gitignore
 create mode 100755 etc/acpi/handler.sh

diff --git a/etc/.gitignore b/etc/.gitignore
index 078f670..1b97b8d 100644
--- a/etc/.gitignore
+++ b/etc/.gitignore
@@ -5,7 +5,6 @@
 /*.orig
 /*.OLD
 /UPower/
-/acpi/
 /adjtime
 /appstream.conf
 /apparmor.d/
diff --git a/etc/acpi/.gitignore b/etc/acpi/.gitignore
new file mode 100644
index 0000000..5a8bf06
--- /dev/null
+++ b/etc/acpi/.gitignore
@@ -0,0 +1 @@
+/events/
diff --git a/etc/acpi/handler.sh b/etc/acpi/handler.sh
new file mode 100755
index 0000000..3cb47e0
--- /dev/null
+++ b/etc/acpi/handler.sh
@@ -0,0 +1,97 @@
+#!/bin/sh
+# Default acpi script that takes an entry for all actions
+
+# NOTE: This is a 2.6-centric script.  If you use 2.4.x, you'll have to
+#       modify it to not use /sys
+
+# $1 should be + or - to step up or down the brightness.
+step_backlight() {
+    for backlight in /sys/class/backlight/*/; do
+        [ -d "$backlight" ] || continue
+        step=$(( $(cat "$backlight/max_brightness") / 20 ))
+        [ "$step" -gt "1" ] || step=1 #fallback if gradation is too low
+        printf '%s' "$(( $(cat "$backlight/brightness") $1 step ))" >"$backlight/brightness"
+    done
+}
+
+minspeed=$(cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq)
+maxspeed=$(cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq)
+setspeed="/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed"
+
+
+case "$1" in
+    button/power)
+        case "$2" in
+            PBTN|PWRF)
+                logger "PowerButton pressed: $2, shutting down..."
+                shutdown -P now
+                ;;
+            *)  logger "ACPI action undefined: $2" ;;
+        esac
+        ;;
+    button/sleep)
+        case "$2" in
+            SBTN|SLPB)
+                # suspend-to-ram
+                logger "Sleep Button pressed: $2, suspending..."
+                zzz
+                ;;
+            *)  logger "ACPI action undefined: $2" ;;
+        esac
+        ;;
+    ac_adapter)
+        case "$2" in
+            AC|ACAD|ADP0)
+                case "$4" in
+                    00000000)
+                        printf '%s' "$minspeed" >"$setspeed"
+                        #/etc/laptop-mode/laptop-mode start
+                    ;;
+                    00000001)
+                        printf '%s' "$maxspeed" >"$setspeed"
+                        #/etc/laptop-mode/laptop-mode stop
+                    ;;
+                esac
+                ;;
+            *)  logger "ACPI action undefined: $2" ;;
+        esac
+        ;;
+    battery)
+        case "$2" in
+            BAT0)
+                case "$4" in
+                    00000000)   #echo "offline" >/dev/tty5
+                    ;;
+                    00000001)   #echo "online"  >/dev/tty5
+                    ;;
+                esac
+                ;;
+            CPU0)
+                ;;
+            *)  logger "ACPI action undefined: $2" ;;
+        esac
+        ;;
+    button/lid)
+        case "$3" in
+            close)
+                # suspend-to-ram
+                #logger "LID closed, suspending..."
+                #zzz
+                :
+                ;;
+            open)
+                logger "LID opened"
+                ;;
+            *)  logger "ACPI action undefined (LID): $2";;
+        esac
+        ;;
+    video/brightnessdown)
+        step_backlight -
+        ;;
+    video/brightnessup)
+        step_backlight +
+        ;;
+    *)
+        logger "ACPI group/action undefined: $1 / $2"
+        ;;
+esac