NVIDIA discrete graphics card HDMI can not achieve extended display solution under XP system

user desktop using Geforce 420 discrete graphics, XP system, VGA display, is now ready to cooperate with an HDMI display to achieve dual-screen expansion function, after connecting HDMI display, the system can not be found Recognizing the newly installed HDMI display, the newly installed HDMI display is not recognized in the system display properties, as shown below:

Although two monitors can be recognized in the NVIDIA control panel, only “single mode” can be used. "Copy mode", can not achieve "extended mode", as shown below:

Solution: Connect the HDMI display and restart the computer, after the system can detect the new The connected HDMI display can be dual-screen extended mode. After rebooting, the screenshots are as follows: Select the display to be expanded, and then check “Extend the Windows desktop to this monitor”, as shown below: In the NVIDIA Control Panel You can also see an additional option <; It is irrelevant (dual-screen display mode) & rdquo;, as shown below: Check this option to achieve dual-screen extended display.