[GH-ISSUE #744] Brightness adjustment only works in the first half #486

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opened 2026-05-05 06:06:57 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

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

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Originally created by @Erik262 on GitHub (Oct 27, 2021).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/744

Originally assigned to: @waydabber on GitHub.

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

"A picture is worth a thousand words"

Brightness adjustment only forks in the first half of the "Volumebar"

Steps to reproduce

I'm using a Monitor (Samsung G9) where ddctl seems to be not working or doesn't have it.

Try to adjust the brightness.

Expected behavior

Brightness adjusted :)

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 12.0.1
- Mac model: Hackintosh
- MonitorControl version: 4.0.0
- Monitor(s): Ultrawide Samsung G9
- Apple Silicon/M1 (yes or no): no

Originally created by @Erik262 on GitHub (Oct 27, 2021). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/744 Originally assigned to: @waydabber on GitHub. ### 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 "A picture is worth a thousand words" ![Untitled](https://user-images.githubusercontent.com/11977647/139029096-57600fac-d3a3-45ac-b63d-4b73f6f13c68.gif) Brightness adjustment only forks in the first half of the "Volumebar" ### Steps to reproduce I'm using a Monitor (Samsung G9) where ddctl seems to be not working or doesn't have it. Try to adjust the brightness. ### Expected behavior Brightness adjusted :) ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 12.0.1 - Mac model: Hackintosh - MonitorControl version: 4.0.0 - Monitor(s): Ultrawide Samsung G9 - Apple Silicon/M1 (yes or no): no ```

gitea-mirror closed this issue

2026-05-05 06:06:58 -06:00

gitea-mirror commented

2026-05-05 06:07:02 -06:00

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@waydabber commented on GitHub (Oct 27, 2021):

Hi Erik262,

Thank you for your feedback!

This happens is because "Combine hardware and software dimming" is enabled (under Preferences/General), but the hardware (DDC) component of the control fails with the display. This can either be an issue on the part of the motherboard/GPU hardware (I don't know what card or iGPU use on your Hackintosh), the cabling or the display (maybe DDC is not enabled or the display is incompatible and cannot handle DDC operations).

If the hardware issue cannot be rectified, then I advise you to unclick Use hardware DDC control under Displays.

I'll convert this issue into a Discussion as other users might have the same experience.

@waydabber commented on GitHub (Oct 27, 2021): Hi Erik262, Thank you for your feedback! This happens is because "Combine hardware and software dimming" is enabled (under Preferences/General), but the hardware (DDC) component of the control fails with the display. This can either be an issue on the part of the motherboard/GPU hardware (I don't know what card or iGPU use on your Hackintosh), the cabling or the display (maybe DDC is not enabled or the display is incompatible and cannot handle DDC operations). If the hardware issue cannot be rectified, then I advise you to unclick `Use hardware DDC control` under Displays. <img width="842" alt="Screen Shot 2021-10-27 at 11 48 21" src="https://user-images.githubusercontent.com/37590873/139042526-6641bd05-feeb-4196-8a06-e461b72759e7.png"> I'll convert this issue into a Discussion as other users might have the same experience.