Amazing! About 3 months ago, my flight sim computer (Windows 11) lost the ability to sleep or automatically blank the screen when using the “balanced” power plan. It seemed to happen about the same time I updated my NVidia video driver, so I thought that might be the reason.
I installed the new Windows update this afternoon, and sleep mode is working again! I do, of course, have several gaming controllers hooked up to my FS computer, so I assume one or more of them was causing the problem.
Thanks for the heads-up.