External Display Brightness/Volume Control using native keys stopped working

[rosmur]

Issue Description

The brightness/volume control of an external display using the native keys suddenly stopped working.

• Controlling the brightness/volume through BetterDisplay GUI is WORKING
• External display DDC enabled and identified.
• Control is not working either with MacBook keyboard or external keyboard.
• Control with customs keyboard shortcuts is WORKING.

Environment Details

macOS: Tahoe 26.2
BetterDisplay: v4.1.1

I have no idea when/how it suddenly stopped working. I had disabled auto start on login for a bit but apart from that I made no changes to any settings. Not sure if this correlates to update to 26.2 Tahoe. Looking for help on troubleshooting/debugging. I've done the basics of power cycling and disabling/re-enabling the settings.

[waydabber]

Hi there - this is probably an accessibility permissions issues. Try removing the app from the accessibility permission list and re-adding it under System Settings's Privacy & Security section, maybe the permission database got corrupted during the update.

[rosmur]

Thanks for the quick response. I just tried that. Removed from Accessibility permissions list, BetterDisplay asked for access again, granted access, restarted app. But still the native keys dont work.

Should I try uninstalling and reinstalling?