+ - xserver-xorg-core
+ - xserver-xorg-input-evdev # supports all input devices the kernel knows about
+ - xinit # contains startx
+ - libpam-systemd # needed to start X as non-root
+ - name: ensure 3d acceleration and optimus switch
+ apt: name={{item}} state=present
+ with_items:
+ - linux-headers-amd64 # necessary to build proper nvidia-driver module
+ - libgl1-mesa-dri # necessary for OpenGL 3D acceleration to work
+ - libglu1-mesa # necessary for OpenGL 3D acceleration to work
+ - bumblebee-nvidia
+ - primus