mate-screensaver system wide settings and lock

defaults/main.yaml

@@ -1 +1,3 @@
 ---
+screensaver_locktime: 15
+screensaver_theme: screensavers-popsquares

tasks/main.yaml

@@ -11,9 +11,29 @@
   apt:
     pkg:
       - mate-screensaver
+      - xscreensaver-gl
 
 - name: gdmflexiserver dummy script
   copy:
     src: gdmflexiserver-fake.sh
     dest: /usr/local/bin/gdmflexiserver
     mode: 0755
+
+- import_role:
+    name: dconf-lock
+  vars:
+    dconf_lock_id: screensaver
+    dconf_lock_settings:
+      /org/mate/screensaver:
+        idle-activation-enabled: 'true'
+        lock-enabled: 'true'
+        mode: "'single'"
+        themes: "['{{screensaver_theme}}']"
+      /org/mate/desktop/session:
+        idle-delay: "{{ screensaver_locktime | int }}"
+    dconf_lock_paths:
+      - /org/mate/desktop/session/idle-delay
+      - /org/mate/screensaver/idle-activation-enabled
+      - /org/mate/screensaver/lock-enabled
+      - /org/mate/screensaver/mode
+      - /org/mate/screensaver/themes