[NAME]  You must have plugged the monitor into the top integrated graphics HDMI in port rather than the lower RTX 2060 Super HDMI in port.
Just received my XPS 8940. I then connected my monitor with the HDMI cable. I went to open the Nvidia control panel and received this error message, "you are not currently using a display attached to an Nvidia GPU". I downloaded and installed the most current driver still get the same error message.
XPS 8940, RTX 2060 Super, HDMI, not connected