[GH-ISSUE #327] Brightness change not working after disconnecting from external monitor #259

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opened 2026-05-05 05:38:23 -06:00 by gitea-mirror · 2 comments

gitea-mirror commented

2026-05-05 05:38:23 -06:00

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Originally created by @MartinJ2EX on GitHub (Nov 21, 2020).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/327

Originally assigned to: @waydabber on GitHub.

Checklist

I have searched for existing issues
I have looked through the wiki
I have updated MonitorControl to the latest version

When disconnecting my external LG monitor, monitorcontrol shows “no compatible monitor found”, which is correct - BUT then it also blocks any brightness changes to the MacBook’s internal display!
This problem does not exist with version 1.7.1!

To Reproduce
Steps to reproduce the behavior:

Disconnect your external monitor, if you have a MacBook (Pro, Air)
Use your function keys to change your brightness
Nothing will happen!

Expected behavior
With version 1.7.1, which I had prior to 2.x, when disconnecting my external monitor, monitorcontrol somehow deactivated itself and the MacBook’s internal display brightness could be changed as expected.

Environment Information (please complete the following information):

macOS version: 10.15.7
MonitorControl version: 2.1.0
Monitor(s): LG 27UD88, MacBook Pro 2016 15” internal display

Originally created by @MartinJ2EX on GitHub (Nov 21, 2020). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/327 Originally assigned to: @waydabber on GitHub. **Checklist**  - [x] I have searched for existing issues - [x] I have looked through [the wiki](https://github.com/MonitorControl/MonitorControl/wiki) - [x] I have updated MonitorControl to the latest version When disconnecting my external LG monitor, monitorcontrol shows “no compatible monitor found”, which is correct - BUT then it also blocks any brightness changes to the MacBook’s internal display! This problem does not exist with version 1.7.1! **To Reproduce** Steps to reproduce the behavior: 1. Disconnect your external monitor, if you have a MacBook (Pro, Air) 2. Use your function keys to change your brightness 3. Nothing will happen! **Expected behavior** With version 1.7.1, which I had prior to 2.x, when disconnecting my external monitor, monitorcontrol somehow deactivated itself and the MacBook’s internal display brightness could be changed as expected. **Environment Information (please complete the following information):** - macOS version: 10.15.7 - MonitorControl version: 2.1.0 - Monitor(s): LG 27UD88, MacBook Pro 2016 15” internal display

gitea-mirror

2026-05-05 05:38:23 -06:00

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gitea-mirror commented

2026-05-05 05:38:30 -06:00

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@JoniVR commented on GitHub (Nov 22, 2020):

I can confirm this as I've run into the issue myself a few times, thanks for opening the issue.

@JoniVR commented on GitHub (Nov 22, 2020): I can confirm this as I've run into the issue myself a few times, thanks for opening the issue.

gitea-mirror commented

2026-05-05 05:38:34 -06:00

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@waydabber commented on GitHub (Aug 21, 2021):

This issue should be fixed in 3.0.0. Please test if it works. If not, please report here:

https://github.com/MonitorControl/MonitorControl/issues/456

I'll close this issue for now.

Thank you!

@waydabber commented on GitHub (Aug 21, 2021): This issue should be fixed in 3.0.0. Please test if it works. If not, please report here: https://github.com/MonitorControl/MonitorControl/issues/456 I'll close this issue for now. Thank you!