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[GH-ISSUE #1600] MonitorControl unable to open after setting Min. DDC to 5000 #887

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opened 2026-05-05 06:50:01 -06:00 by gitea-mirror · 4 comments

gitea-mirror commented

2026-05-05 06:50:01 -06:00

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Originally created by @kzemin on GitHub (Aug 29, 2024).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1600

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 setting Min. DDC for a monitor, the app crashes and doesn't get to open again.
Running the App's executable under Contents > MacOS doesn't work either.

Steps to reproduce

Go to settings
Select Displays tab
Under a monitor brightness setting, type the Min. DDC to 5000 and Max. DDC to 255.

Expected behavior

App wouldn't crash and inhibit me from entering 5000 as a value.

Anything else?

Terminal output after running MacOS executable:
/Applications/MonitorControl.app/Contents/MacOS/MonitorControl ; exit;
user@User-Macbook ~ % /Applications/MonitorControl.app/Contents/MacOS/MonitorControl ; exit;
zsh: trace trap /Applications/MonitorControl.app/Contents/MacOS/MonitorControl

Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[Process completed]

https://github.com/user-attachments/assets/6dd3c157-82df-4229-a7fa-daa6db10a91d

Environment Information (please complete the following information)

- macOS version: Sonoma 14.5
- Mac model: M1 Air
- MonitorControl version: 4.2.0
- Monitor(s): Apple LED Cinema Display (27-inch)
- Apple Silicon/M1 (yes or no): yes

Originally created by @kzemin on GitHub (Aug 29, 2024). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1600 ### 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 setting Min. DDC for a monitor, the app crashes and doesn't get to open again. Running the App's executable under Contents > MacOS doesn't work either. ### Steps to reproduce 1. Go to settings 2. Select Displays tab 3. Under a monitor brightness setting, type the Min. DDC to 5000 and Max. DDC to 255. ### Expected behavior App wouldn't crash and inhibit me from entering 5000 as a value. ### Anything else? **Terminal output after running MacOS executable:** /Applications/MonitorControl.app/Contents/MacOS/MonitorControl ; exit; user@User-Macbook ~ % /Applications/MonitorControl.app/Contents/MacOS/MonitorControl ; exit; zsh: trace trap /Applications/MonitorControl.app/Contents/MacOS/MonitorControl Saving session... ...copying shared history... ...saving history...truncating history files... ...completed. [Process completed] https://github.com/user-attachments/assets/6dd3c157-82df-4229-a7fa-daa6db10a91d ### Environment Information (please complete the following information) ```markdown - macOS version: Sonoma 14.5 - Mac model: M1 Air - MonitorControl version: 4.2.0 - Monitor(s): Apple LED Cinema Display (27-inch) - Apple Silicon/M1 (yes or no): yes ```

gitea-mirror

2026-05-05 06:50:01 -06:00

closed this issue
added the
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gitea-mirror commented

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

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@waydabber commented on GitHub (Aug 30, 2024):

I recommend deleting app settings (use the defaults delete command with the bundle identifier).

@waydabber commented on GitHub (Aug 30, 2024): I recommend deleting app settings (use the `defaults delete` command with the bundle identifier).

gitea-mirror commented

2026-05-05 06:50:08 -06:00

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@kzemin commented on GitHub (Aug 30, 2024):

Yey! That worked. I had to do defaults delete app.monitorcontrol.MonitorControlLite for my case.
Thanks you.

@kzemin commented on GitHub (Aug 30, 2024): Yey! That worked. I had to do `defaults delete app.monitorcontrol.MonitorControlLite` for my case. Thanks you.

gitea-mirror commented

2026-05-05 06:50:10 -06:00

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@waydabber commented on GitHub (Oct 3, 2024):

Note to self: this is a valid bug, a proper min/max check is needed.

@waydabber commented on GitHub (Oct 3, 2024): Note to self: this is a valid bug, a proper min/max check is needed.

gitea-mirror commented

2026-05-05 06:50:11 -06:00

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@waydabber commented on GitHub (Oct 4, 2024):

Not sure what's wrong, I just entered 5000 to DDC min, 255 to DDC max and the app just went on fine, could start up etc. I think it's handled properly. Will reopen this is it's still a problem.

@waydabber commented on GitHub (Oct 4, 2024): Not sure what's wrong, I just entered 5000 to DDC min, 255 to DDC max and the app just went on fine, could start up etc. I think it's handled properly. Will reopen this is it's still a problem. <img width="842" alt="Screenshot 2024-10-04 at 12 14 52" src="https://github.com/user-attachments/assets/137a4703-1cae-4d65-acfd-c5baaaa64968">