neowin[.]net/news/microsoft-amd-nvidia-are-all-sleeping-on-windows-11-mpo-display-issues/
Multiplane Overlay [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".
Plenty of forum posts and threads online are from users who fixed seemingly their display issues by disabling MPO. In fact, Nvidia had once issued a hotfix that recommended disabling the option via a registry tweak. The classic symptoms generally include stuttering, black screen or white screen issues, flickering, among others, in Windows, as well as in browsers like Chrome or Edge. It is possible that some enterprise software display issues, like the one where the Citrix workspace mouse cursor goes white, could also be fixed. Some users say driver timeout issues were fixed too.
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:00000005Steps:
Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm
Right-click > New > DWORD 32-bit value
Name the new DWORD value "OverlayTestMode"
Modify OverlayTestMode DWORD value by right-clicking
Enter value data "00000005"To restore MPO in case you encounter any issues after this, simply delete the OverlayTestMode DWORD you created.