+ - 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
+ - libgl1-mesa-dri # necessary for OpenGL 3D acceleration to work
+ - bumblebee-nvidia
+ - primus