waydabber

Does brightness control BetterDisplay exhibit the same issue with brightness control as MonitorControl? MonitorControl uses vendor/model id to identify displays while BetterDisplay uses UUID by default. If identifiers match up...

It simply depends on the order the displays are enumerated and which gets the lower CGDirectDisplayID ("CGDD ID" in BetterDisplay). When reattaching one of the displays, the order is reversed....

It might be the HP Envy 27". Some displays don't register DDC commands well and periodically reset to the OSD setting?

Well, if hardware control is not enabled then it is a software issue. Is syncing enabled?

The issue might be related to https://github.com/MonitorControl/MonitorControl/issues/1028 ?

I am afraid the Apple LED Cinema Display does not allow volume control via DDC. It should have a built-in USB control though but that support might have been removed...

Translation: _When this version is used, the built-in system volume control button will be disabled, so now you can only adjust the volume through the volume controller that comes with...

Hey @KAMIKAZEUA - are you using an external display or only the built-in display?

All right. The problem probably is that MonitorControl disengages from the keyboard completely when only the internal display is connected. This is intentional and is a feature actually (there were...

I think this was the reason: https://github.com/MonitorControl/MonitorControl/issues/456