PowerToys Power Display module does not detect LG monitor as a brightness-controllable display in a multi-monitor setup.

### Microsoft PowerToys version

0.99.1

### Installation method

Microsoft Store

### Area(s) with issue?

Power Display

### Steps to reproduce

Open PowerToys
Enable Power Display module
Click “Detect monitors”
All monitors are detected and labeled correctly (1, 2, etc.)
Click PowerToys tray icon to adjust brightness
Check available monitors in brightness control list

### ✔️ Expected Behavior

LG monitor should appear in the brightness control list and allow brightness adjustment.

### ❌ Actual Behavior

LG monitor does not appear in the brightness control list at all.

Even after refreshing monitor detection, it is still missing
Other monitor works correctly and appears in the list

### Upload Bug Report ZIP-file

[PowerToysReport_2026-05-02-13-00-49.zip](https://github.com/user-attachments/files/27300672/PowerToysReport_2026-05-02-13-00-49.zip)

### Additional Information

Monitor shows as Generic PnP Monitor in system
HDR is supported
Issue occurs only on LG monitor
Multi-monitor setup works otherwise without issues
TWINKLE TRAY app was successfully working

### Other Software

_No response_

Start with the Power Display monitor-detection and brightness-control entry points, using the reproduction steps and attached PowerToysReport ZIP as the initial evidence. Reproduce the multi-monitor setup with the LG monitor, then verify that monitor appears in the brightness control list and can be adjusted without affecting the monitor that already works.

Written by the indexing model from the issue text.