What to do if dual display does not appear or is not displayed in Windows 11.

AMD Radeon

https://www.amd.com/en/support

nVIDIA
https://www.nvidia.co.jp/Download/index.aspx?lang=jp

Intel® Graphics – Windows * DCH Drivers
https://www.intel.com/content/www/us/en/download/19344/intel-graphics-windows-dch-drivers.html
igfx_win_101.1069.exe As of
2021/11/12.


After installing the latest display driver

After clicking the display adapter from the device driver, the graphic chip name is displayed below it, right-click it, left-click to select Update Driver, and then left-click to search for the driver automatically. You should now see dual displays such as HDMI.