From 7ea913d87fb034d9053d983bd0b94108897e9e25 Mon Sep 17 00:00:00 2001
From: Freek Bes <freek.bes@codam.nl>
Date: Tue, 4 Feb 2025 15:48:33 +0100
Subject: [PATCH 1/3] install acpilight for backlight control

---
 tasks/init.yml | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/tasks/init.yml b/tasks/init.yml
index 7a34791..5fbd55c 100644
--- a/tasks/init.yml
+++ b/tasks/init.yml
@@ -17,6 +17,46 @@
     - xprintidle
   # Assume lightdm, nodejs and npm are already installed by 42.app
 
+- name: Check if xbacklight binary exists
+  tags: [codam.webgreeter, codam.webgreeter.init]
+  shell:
+    cmd: "which xbacklight"
+  register: xbacklight_bin
+  changed_when: false
+  failed_when: false
+
+- name: Clone acpilight repository
+  tags: [codam.webgreeter, codam.webgreeter.init]
+  git:
+    repo: https://gitlab.com/wavexx/acpilight.git
+    dest: /tmp/acpilight
+    version: v1.2
+  when: xbacklight_bin.stdout == "" # Only when xbacklight is not already available (acpilight is a replacement and has better support)
+
+- name: Install acpilight
+  tags: [codam.webgreeter, codam.webgreeter.init]
+  become: true
+  make:
+    target: install
+    chdir: /tmp/acpilight
+  when: xbacklight_bin.stdout == ""
+
+- name: Check if video group exists # Only exists if acpilight was installed
+  tags: [codam.webgreeter, codam.webgreeter.init]
+  shell:
+    cmd: "getent group video"
+  register: video_group
+  changed_when: false
+  failed_when: false
+
+- name: Add lightdm user to video group
+  tags: [codam.webgreeter, codam.webgreeter.init]
+  user:
+    name: lightdm
+    groups: video
+    append: yes
+  when: video_group.stdout == ""
+
 - name: Download nody-greeter deb to ansible controller
   tags: [codam.webgreeter, codam.webgreeter.init]
   delegate_to: localhost

From 63ad25ab5c186a553d3c87ee86f5eeaba5df0699 Mon Sep 17 00:00:00 2001
From: Freek Bes <freek.bes@codam.nl>
Date: Tue, 4 Feb 2025 15:52:32 +0100
Subject: [PATCH 2/3] fix adding lightdm to video group not running

---
 tasks/init.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tasks/init.yml b/tasks/init.yml
index 5fbd55c..7c04f76 100644
--- a/tasks/init.yml
+++ b/tasks/init.yml
@@ -55,7 +55,7 @@
     name: lightdm
     groups: video
     append: yes
-  when: video_group.stdout == ""
+  when: video_group.stdout != ""
 
 - name: Download nody-greeter deb to ansible controller
   tags: [codam.webgreeter, codam.webgreeter.init]

From 4f270a15cc83c4715b9f778b6388d3b46ee26f7e Mon Sep 17 00:00:00 2001
From: Freek Bes <freek.bes@codam.nl>
Date: Tue, 4 Feb 2025 16:56:33 +0100
Subject: [PATCH 3/3] add ddcci-backlight kernel module

for backlight control on external monitors
---
 tasks/init.yml | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/tasks/init.yml b/tasks/init.yml
index 7c04f76..064c99d 100644
--- a/tasks/init.yml
+++ b/tasks/init.yml
@@ -13,10 +13,19 @@
     name: "{{ item }}"
     state: present
   with_items:
-    - light-locker
-    - xprintidle
+    - light-locker # For locking the screen
+    - xprintidle # For detecting idle time of a user
+    - ddcci-dkms # For backlight control on external monitors
   # Assume lightdm, nodejs and npm are already installed by 42.app
 
+- name: Enable ddcci-backlight kernel module
+  tags: [codam.webgreeter, codam.webgreeter.init]
+  become: true
+  modprobe:
+    name: ddcci-backlight
+    state: present
+    persistent: present
+
 - name: Check if xbacklight binary exists
   tags: [codam.webgreeter, codam.webgreeter.init]
   shell: