[GH-ISSUE #321] Two Asus VZ27A monitors, sliding brightness for each changes same one #255

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opened 2026-05-05 05:30:45 -06:00 by gitea-mirror · 4 comments

gitea-mirror commented

2026-05-05 05:30:45 -06:00

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Originally created by @ylluminate on GitHub (Nov 14, 2020).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/321

I have two Asus VZ27A monitors. The controls for each show up in MonitorControl, but when I alter either of the brightnesses it only manipulates the primary VZ27A. It seems as though MonitorControl is not differentiating between the two devices.

Any thoughts?

Running on 10.15.7 on a MacPro5,1.

Originally created by @ylluminate on GitHub (Nov 14, 2020). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/321 I have two Asus VZ27A monitors. The controls for each show up in MonitorControl, but when I alter either of the brightnesses it only manipulates the primary VZ27A. It seems as though MonitorControl is not differentiating between the two devices. Any thoughts? Running on 10.15.7 on a MacPro5,1.

gitea-mirror

2026-05-05 05:30:45 -06:00

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gitea-mirror commented

2026-05-05 05:30:51 -06:00

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@AlexKusnezov commented on GitHub (Nov 14, 2020):

Same here, I have two Samsung U28E850, the id differs only by one digit, but the app still changes only the primary monitors' brightness.

@AlexKusnezov commented on GitHub (Nov 14, 2020): Same here, I have two Samsung U28E850, the id differs only by one digit, but the app still changes only the primary monitors' brightness.

gitea-mirror commented

2026-05-05 05:30:52 -06:00

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@ydkn commented on GitHub (Nov 14, 2020):

Also facing the same issue on a MacBookPro14,2 running macOS 11.0.1 with 2 HP Z27.

@ydkn commented on GitHub (Nov 14, 2020): Also facing the same issue on a MacBookPro14,2 running macOS 11.0.1 with 2 HP Z27.

gitea-mirror commented

2026-05-05 05:30:55 -06:00

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@JoniVR commented on GitHub (Nov 20, 2020):

Duplicate of #49

@JoniVR commented on GitHub (Nov 20, 2020): Duplicate of #49

gitea-mirror commented

2026-05-05 05:30:57 -06:00

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@ylluminate commented on GitHub (Nov 21, 2020):

Thanks for pointing this out, I tried to make a comment on that thread, but getting some kind of error so I'll post it here @JoniVR:

Tried the modified build and strangely it doesn't even appear in the menubar. The process is running and shows up in Activity Monitor.app. When running from the shell it behaves the same and has the following output:

2020-11-21 01:55:48.968 MonitorControl[84770:249524] *** Assertion failure in -[MASPreferencesWindowController initWithWindowNibPath:owner:], /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1894.60.100/Controllers/NSWindowController.m:214
2020-11-21 01:55:48.968 MonitorControl[84770:249524] Invalid parameter not satisfying: windowNibPath
2020-11-21 01:56:00.704 MonitorControl[84770:249524] Warning: Window move completed without beginning
2020-11-21 01:56:03.537 MonitorControl[84770:249524] Warning: Window move completed without beginning

@ylluminate commented on GitHub (Nov 21, 2020): Thanks for pointing this out, I tried to make a comment on that thread, but getting some kind of error so I'll post it here @JoniVR: Tried [the modified build](https://github.com/MonitorControl/MonitorControl/issues/49#issuecomment-640094882) and strangely it doesn't even appear in the menubar. The process is running and shows up in Activity Monitor.app. When running from the shell it behaves the same and has the following output: ``` 2020-11-21 01:55:48.968 MonitorControl[84770:249524] *** Assertion failure in -[MASPreferencesWindowController initWithWindowNibPath:owner:], /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1894.60.100/Controllers/NSWindowController.m:214 2020-11-21 01:55:48.968 MonitorControl[84770:249524] Invalid parameter not satisfying: windowNibPath 2020-11-21 01:56:00.704 MonitorControl[84770:249524] Warning: Window move completed without beginning 2020-11-21 01:56:03.537 MonitorControl[84770:249524] Warning: Window move completed without beginning ```

gitea-mirror referenced this issue

2026-05-05 07:04:05 -06:00

[PR #263] [MERGED] Improve string consistency (#255) #1077