[GH-ISSUE #1409] Dual LG Ultrafine 27" Primary Monitor Only Adjusted #797

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opened 2026-05-05 06:43:18 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:43:18 -06:00

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Originally created by @ontoarch on GitHub (Aug 3, 2023).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1409

Before opening the issue, have you...?

Searched for existing issues
Looked through the wiki
Updated MonitorControl to the latest version (if applicable)

Describe the bug

When using dual LG ultrafine 27" monitors, the controls, specifically brightness only works on the primary monitor and adjusting the secondary (extended display) adjusts the primary. The hardware is M2 Max Pro MBP 2023 May build running Ventura 13.5.

Steps to reproduce

Upon startup using dropdown adjust monitor brightness

Expected behavior

To control both displays independently

Anything else?

No response

Environment Information (please complete the following information)

- macOS version:13.5
- Mac model:M2 Max Pro MBP
- MonitorControl version:4.1.0
- Monitor(s):LG Ultrafine 27"
- Apple Silicon/M1 (yes or no): yes

Apple M2 Max:

  Chipset Model:	Apple M2 Max
  Type:	GPU
  Bus:	Built-In
  Total Number of Cores:	38
  Vendor:	Apple (0x106b)
  Metal Support:	Metal 3
  Displays:
LG UltraFine:
  Resolution:	5120x2880 (5K/UHD+ - Ultra High Definition Plus)
  UI Looks like:	2560 x 1440 @ 60.00Hz
  Main Display:	Yes
  Mirror:	Off
  Online:	Yes
  Rotation:	Supported
  Automatically Adjust Brightness:	No
LG UltraFine:
  Resolution:	5120x2880 (5K/UHD+ - Ultra High Definition Plus)
  UI Looks like:	2560 x 1440 @ 60.00Hz
  Mirror:	Off
  Online:	Yes
  Rotation:	Supported
  Automatically Adjust Brightness:	No

Originally created by @ontoarch on GitHub (Aug 3, 2023). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1409 ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Looked through [the wiki](https://github.com/MonitorControl/MonitorControl/wiki) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the bug When using dual LG ultrafine 27" monitors, the controls, specifically brightness only works on the primary monitor and adjusting the secondary (extended display) adjusts the primary. The hardware is M2 Max Pro MBP 2023 May build running Ventura 13.5. ### Steps to reproduce Upon startup using dropdown adjust monitor brightness ### Expected behavior To control both displays independently ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version:13.5 - Mac model:M2 Max Pro MBP - MonitorControl version:4.1.0 - Monitor(s):LG Ultrafine 27" - Apple Silicon/M1 (yes or no): yes Apple M2 Max: Chipset Model: Apple M2 Max Type: GPU Bus: Built-In Total Number of Cores: 38 Vendor: Apple (0x106b) Metal Support: Metal 3 Displays: LG UltraFine: Resolution: 5120x2880 (5K/UHD+ - Ultra High Definition Plus) UI Looks like: 2560 x 1440 @ 60.00Hz Main Display: Yes Mirror: Off Online: Yes Rotation: Supported Automatically Adjust Brightness: No LG UltraFine: Resolution: 5120x2880 (5K/UHD+ - Ultra High Definition Plus) UI Looks like: 2560 x 1440 @ 60.00Hz Mirror: Off Online: Yes Rotation: Supported Automatically Adjust Brightness: No ```

gitea-mirror closed this issue

2026-05-05 06:43:19 -06:00

gitea-mirror commented

2026-05-05 06:43:21 -06:00

Author

Owner

@waydabber commented on GitHub (Aug 10, 2023):

This issue has complex reasons with multi-monitor setups and addressing them in MonitorControl would require some deeper changes. You can try the latest 2.x version of BetterDisplay to see if you have this issue: https://github.com/waydabber/BetterDisplay/releases

@waydabber commented on GitHub (Aug 10, 2023): This issue has complex reasons with multi-monitor setups and addressing them in MonitorControl would require some deeper changes. You can try the latest 2.x version of BetterDisplay to see if you have this issue: https://github.com/waydabber/BetterDisplay/releases