Vagrant: Ubuntu GUI Virtualbox

Vagrantfile

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/xenial64"
  config.vm.provider "virtualbox" do |vb|
    vb.customize ["modifyvm", :id, "--memory", 1024, "--cpus", 1, "--vram", 256, "--accelerate3d", "on"]
    vb.customize ["setextradata", :id, "GUI/MaxGuestResolution", "any" ]
    vb.customize ["setextradata", :id, "CustomVideoMode1", "1024x768x32" ]
    vb.customize ["setextradata", :id, "GUI/CustomVideoMode1", "1024x768x32" ]
    vb.gui = true
  end
  config.vm.provision "shell", inline: <<-SHELL
    apt-get update
    apt-get upgrade -y
    apt-get install -y ubuntu-desktop
    reboot
  SHELL
end