[bug]: Brightness syncing only works via OpenDisplay controls

[sampotts]

OpenDisplay version

0.11.0

Build flavor

Full

macOS version / build

26.6.2 (25G83)

Mac model & chip

MacBook Pro 16" M4 Max

Display model(s)

Pro Display XDR, Studio Display

Connection route

Thunderbolt dock

Steps to reproduce

1. Add both displays to a group.
2. Turn on "Use the brightness & volume keys to control displays" option in Health & Recovery (you may want to reconsider the position in the IA - perhaps a different section for those options?) and allow in System Settings (I even restarted the app to be sure it had permission).

I also have Alcove installed but even with that quit, it makes no difference.

Expected vs actual behavior

Expected

Adjusting brightness on one display causes the other to sync via any on the input controls; the brightness controls, system settings, or OpenDisplay's own controls.

Actual

Adjusting brightness only syncs via OpenDisplay's own controls.

Was a recovery action needed?

No

Logs / diagnostics bundle

No response

[sampotts]

Opened a PR but I'll openly admit this was predominantly Codex / GPT 6 but it might give you some ideas. Feel free to ditch it if you have a better way to handle it 👍🏼