https://www.neowin.net/news/microsoft-amd-nvidia-are-all-sleeping-on-windows-11-mpo-display-issues/
…one of the most recurring problems that plague user PCs is related to MPO or Multiplane Overlay…When executing multiple frame buffers, MPO was meant to reduce CPU and GPU overhead with the help of a fixed-function hardware unit in the display controller as opposed to using up shader cycles…
However, the feature has often been plagued with issues. And although Microsoft has in the past dealt with problems and bugs related to MPO and other Desktop Window Manager (DWM) features, in recent times with Windows 11, the issue seems to have mostly been ignored by hardware vendors like AMD and Nvidia, as well as software giant Microsoft…
While not every display-related bug is due to MPO, disabling the option could come in handy if you have been unable to resolve the issue by other means. To disable MPO, head over to the Display Window Manager (DWM) registry address below and add the “OverlayTestMode” DWORD value 00000005.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm
“OverlayTestMode”=dword:00000005..
