Added brightness fix

RELEASES.md

@@ -7,8 +7,8 @@
 * Enabled old-releases for apt source
 * Installed base packages
 * Installed initial build tools and image creation tools
-* Replace Firefox with Brave web browser
-* Remove miscellaneous packages
+* Replaced Firefox with Brave web browser
+* Removed miscellaneous packages
 * Installed EmComm Tools branding
 * Applied initial GNOME settings
 * Initial work to improve brightness issues on Panasonic hardware

overlay/lib/systemd/system/panasonic-brightness.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Brightness fix for Panasonic hardware
+ConditionPathExists=/sys/class/backlight/panasonic
+After=multi-user.target
+
+[Service]
+Type=simple
+ExecStart=/opt/emcomm-tools/sbin/panasonic-set-brightness.sh
+
+[Install]
+WantedBy=multi-user.target

overlay/opt/emcomm-tools/sbin/panasonic-set-brightness.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 16 January 2023
+# Updated : 16 March 2024
+# Purpose : Fix screen brightness on Panasonic hardware
+#
+# Note: This fix is based on the following article:
+# https://www.bobjohnson.com/bloghow-to-install-ubuntu-on-a-panasonic-toughbook-cf31/
+
+PATH=/opt/emcomm-tools/bin:$PATH
+
+WatchDriver="/sys/class/backlight/panasonic"
+PatchDriver="/sys/class/backlight/intel_backlight"
+
+if [ ! -d $WatchDriver ]; then
+    et-log  "This is not a Pansonic system. Exiting."
+    exit 1
+fi
+
+if [ ! -d $PatchDriver ]; then
+    et-log "Patch driver directory does not exist: ${PatchDriver}"
+    exit 1
+fi
+
+# Get maximum brightness values
+WatchMax=$(cat $WatchDriver/max_brightness)
+PatchMax=$(cat $PatchDriver/max_brightness)
+
+SetBrightness () {
+    # Calculate watch current percentage
+    WatchAct=$(cat $WatchDriver/actual_brightness)
+    WatchPer=$(( WatchAct * 100 / WatchMax ))
+    # Reverse engineer patch brightness to set
+    PatchAct=$(( PatchMax * WatchPer / 100 ))
+    echo $PatchAct | sudo tee $PatchDriver/brightness
+}
+
+# When machine boots, set brightness to last saved value
+SetBrightness
+# Wait forever for user to press Fn keys adjusting brightness up/down.
+while (true); do
+    /usr/bin/inotifywait --event modify $WatchDriver/actual_brightness
+    SetBrightness
+done

scripts/fix-panasonic-brightness.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 16 January 2023
+# Updated : 16 March 2024
+# Purpose : Fix screen brightness on Panasonic hardware
+
+et-log "Installing Panasonic brightness fix..."
+
+apt install inotify-tools -y
+
+if [ ! -e $ET_HOME/sbin ]; then
+  mkdir -v -p $ET_HOME/sbin
+  chown -v $ET_USER:$ET_GROUP $ET_HOME/sbin
+fi
+
+cp -v ../overlay/$ET_HOME/sbin/panasonic-set-brightness.sh $ET_HOME/sbin/
+chmod -v 755 $ET_HOME/sbin/panasonic-set-brightness.sh
+chown -v $ET_USER:$ET_GROUP $ET_HOME/sbin/*
+
+cp -v ../overlay/lib/systemd/system/panasonic-brightness.service /lib/systemd/system/
+
+systemctl daemon-reload
+systemctl enable panasonic-brightness
+systemctl start panasonic-brightness

scripts/install-ubuntu-image-tools-only.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+#
+# Author  : Gaston Gonzalez
+# Date    : 16 March 2024
+# Purpose : Minimal install of image build tools for Ubuntu
+set -e
+
+. ./env.sh
+. ./functions.sh
+
+exitIfNotRoot
+
+./bootstrap.sh
+./update-apt.sh
+
+et-log "Installing tools for building custom ISO image"
+if ! command -v cubic
+then
+  sudo apt-add-repository universe -y
+  sudo apt-add-repository ppa:cubic-wizard/release -y
+  sudo apt update
+  sudo apt install --no-install-recommends cubic -y
+fi