windows-display-dimming
Installation
SKILL.md
Windows display auto-dimming
Three unrelated mechanisms dim a laptop panel on their own, and users describe all of them as "dynamic brightness". Identify which one before changing anything — the fix for each is in a different place, and the most common one is not the setting people reach for first.
Start with the audit. Read-only, changes nothing.
powershell -ExecutionPolicy Bypass -File scripts/Test-DisplayDimming.ps1
The three mechanisms
| # | Mechanism | Reacts to | Where it lives |
|---|---|---|---|
| 1 | Adaptive brightness | Room light, via an ambient light sensor | powercfg SUB_VIDEO ADAPTBRIGHT |
| 2 | Content-adaptive dimming (CABC / Intel DPST / AMD Vari-Bright) | What is on screen — dims on dark content | GPU driver registry |
| 3 | Battery-saver dimming | Unplugging | powercfg SUB_ENERGYSAVER ESBRIGHTNESS |