[GH-ISSUE #1610] External monitor often turns black when I increase or decrease the brightness #896

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opened 2026-05-05 06:50:33 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:50:33 -06:00

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Originally created by @alpennec on GitHub (Sep 20, 2024).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1610

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

Hello,

I've a really annoying issue: when I increase or decrease the brightness of my external monitor, the external monitor turns black. I need to switch it off and on again. I've observed that on macOS Sonoma and Sequoia.

My monitor is an LG 32UN880, connected to a MacBook Pro M2 with a USB-C cable.
I'm using MonitorControl 4.3.1-beta Build 7087.

Thanks,

Steps to reproduce

I haven't found how to reproduce this issue manually. It's random.

Expected behavior

I haven't found how to reproduce this issue manually. It's random.

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 15.0 (24A335)
- Mac model: MacBook Pro Apple M2 Pro
- MonitorControl version: 4.3.1-beta Build 7087
- Monitor(s): LG 32UN880
- Apple Silicon/M1 (yes or no): M2 Pro

Originally created by @alpennec on GitHub (Sep 20, 2024). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1610 ### 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 Hello, I've a really annoying issue: when I increase or decrease the brightness of my external monitor, the external monitor turns black. I need to switch it off and on again. I've observed that on macOS Sonoma and Sequoia. My monitor is an LG 32UN880, connected to a MacBook Pro M2 with a USB-C cable. I'm using MonitorControl 4.3.1-beta Build 7087. Thanks, ### Steps to reproduce I haven't found how to reproduce this issue manually. It's random. ### Expected behavior I haven't found how to reproduce this issue manually. It's random. ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 15.0 (24A335) - Mac model: MacBook Pro Apple M2 Pro - MonitorControl version: 4.3.1-beta Build 7087 - Monitor(s): LG 32UN880 - Apple Silicon/M1 (yes or no): M2 Pro ```

gitea-mirror closed this issue

2026-05-05 06:50:35 -06:00

gitea-mirror commented

2026-05-05 06:50:37 -06:00

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@waydabber commented on GitHub (Sep 21, 2024):

This might be some monitor specific issue. Not sure about the reason. I'll convert this into a discussion, maybe others can chime in with the same display.

@waydabber commented on GitHub (Sep 21, 2024): This might be some monitor specific issue. Not sure about the reason. I'll convert this into a discussion, maybe others can chime in with the same display.