now sets screen resolution

group_vars/all/vars.yml

@@ -1,3 +1,4 @@
 ---
 vm_net_interface_name: eth0
-desired_keyboard_layout: de
+desired_keyboard_layout: de
+desired_screen_resolution: 1920x1080

roles/system_settings/tasks/main.yml

@@ -2,3 +2,5 @@
 - name: Set keyboard layout
   command: "setxkbmap -layout {{ desired_keyboard_layout }}"
 
+- name: Set screen resolution
+  command: "xrandr -s {{ desired_screen_resolution }}"