cMP 5,1 Triple Monitor [Brightness works on 1 monitor, Audio doesn't adjust]

[fireheadman]

Checklist

• [ x] I have searched for existing issues
• [ x] I have looked through the wiki
• [ x] I have updated MonitorControl to the latest version

Describe the bug
Couldn't locate a matrix of what hardware is supported.
I have 2010 cMP 5,1. I use x3 ASUS VG248 gaming monitors (all connected by DisplayPort to Sapphire Radeon Vega 64)
Only 1 will dim the brightness.
Audio controls work from apple keyboard, but it doesn't actually adjust (lower/raise) volume the digital channel.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'click F1/F2 keys for brightness'
2. Click on 'F10|F11|F12 to control audio'
3. Scroll down to '....'
4. See error

Expected behavior
Expected brightness on all 3 monitors to work
Expected audio control to work

Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Add any other context about the problem here.

Environment Information (please complete the following information):

• macOS version: BigSur 11.2.3
• MonitorControl version: v2.1.0
• Monitor(s): x3 - VG248 ASUS monitors - Display Port

PS: I am willing to test if you have plans to support my profile.
THanks
Ben

[waydabber]

Hi, do you still have this problem? Normally only the active display is being controlled (on older versions the one with active menu bar) and there is a special setting to enable control for all displays. Does this help? Thank you!

[fireheadman]

dont know... uninstalled due to slow feedback

[waydabber]

Ok, no problem. Thanks for responding though!