Please plug the VGA port first, then plug the Display port when you connect them as the same time.
DIFFERENT WAYS FOR VIDEO OUTPUT
3 monitor connectors, respectively HDMI, DisplayPort and VGA with the possibility of connecting 2 monitors,
Mirror or extend your laptop into a bigger screen.
HDMI Resolution up to max 4kx2k @ 30Hz
DisplayPort resolution up to 4kx2k @ 30Hz
VGA resolution up to 1920x1080P @ 60Hz