It says Generic PnP monitor under monitors.
Can you go to the monitor manufacturer's website, and download a specific driver for your specific monitor.
install the driver, and try to get the specific monitor to show up in your device manager. That way you *won't* show the "generic" driver anymore. If you can't find the manufacturer's provided driver, you could also try going to the generic device driver in display manager, and selecting "update," and see if windows could find one. But I'd suggest you doing the footwork instead, and finding the specific driver, and installing that.
I still think the video card is sending a signal for a generic display and playing it safe, but if you have the specific non-generic display driver installed, the video card could send a signal that is properly understandable by the non-generic specific monitor's driver.