Is there any way to speed up resolution changes?

[RustyShacklefordIII]

When using FullscreenWindowMode = 1 in an old DX8 game (brough to DX9 using d3d8to9) the game's shell menus which are locked at 1200x900 now display in fullscreen nicely. Dxwrapper seems to do this by simply changing the desktop resolution to 1200x900. But this process takes around 5 seconds during which I see a black screen. When launching an actual game from one of the shell menus the dxwrapper changes the desktop resolution to whatever resolution the game is set to run at in its graphics options menu. I've set it to 2560x1440, the same as the desktop resolution. So when launching a game the screens goes black for 5 seconds again, and also whenever I press escape to enter a shell menu from inside the game the resolution switches back to 1200x900 and I see 5 seconds of black screen again.

Is there any way to speed these resolution changes up? I've tried playing with the LoopSleepTime and WindowSleepTime settings, but haven't really achieved much that way, but maybe I'm missing something?

P.S. If I change the desktop resolution in Windows 10's display settings it is instantaneous without any black screens.

[elishacloud]

I answered this question in #370

[RustyShacklefordIII]

FIXED: I had to add a custom resolution with the exact refresh rate (with 3 decimals) of my monitor using the Nvidia control center.