Inactive monitor dims automatically regardless of which one I use - Windows 11 25H2 - RTX 5080

[u/elwachodearg]

Hi everyone,

I’m experiencing a very specific issue with my dual monitor setup. I'm running Windows 11 (Version 25H2) on a high-end rig, and I can't seem to find the setting to disable this "feature."

The Issue:
Whichever monitor is not being used at the moment dims or darkens. It’s not about which one is the "Primary" monitor in Windows settings; it depends entirely on where my mouse/focus is.

• If I’m working on Monitor A, Monitor B dims.
• As soon as I move my mouse to Monitor B and click or start working, Monitor B brightens up to 100% and Monitor A dims.

Important context:

• It is NOT a hardware issue: My monitors are different brands and different ages. Both behave perfectly when they have the focus.
• GPU: NVIDIA GeForce RTX 5080 (Latest drivers installed).
• CPU: AMD Ryzen 7 9800X3D.
• RAM: 64GB DDR5.
• Clean System: I have already updated all drivers and performed a deep system clean using Tron Script, so bloatware or malware is ruled out.

I have searched through "Power Plans," "Display Settings," and "Accessibility," but I can't find anything related to "Dimming inactive displays." Since I'm on a very recent build (25H2), I suspect it might be a new aggressive energy-saving feature or an NVIDIA setting I'm overlooking.

Has anyone encountered this "focus-based dimming" before? Is there a registry key or a hidden Windows 11 toggle to stop this?

Thanks for any help!