I'm seeing the same issue on Ubuntu 18.04. I have an Nvidia card (GTX 1050 Ti), Intel i7-4770 (4 cores), 12GB RAM:
displaymanager : xrandr version warning. 1.5 client has 4 screens displaymanager screen (0)(HDMI-0): 3840 x 2160 Using libudev for joystick management Importing game controller configs