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[GH-ISSUE #397] Philips 279C9 not working #316

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opened 2026-05-05 05:44:09 -06:00 by gitea-mirror · 7 comments

gitea-mirror commented

2026-05-05 05:44:09 -06:00

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Originally created by @csz-Seven on GitHub (Feb 27, 2021).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/397

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

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To Reproduce
Steps to reproduce the behavior:

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Click on '....'
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Expected behavior
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Environment Information (please complete the following information):

macOS version:
MonitorControl version:
Monitor(s):

Originally created by @csz-Seven on GitHub (Feb 27, 2021). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/397 Originally assigned to: @waydabber on GitHub. **Checklist**  - [ ] I have searched for existing issues - [ ] I have looked through [the wiki](https://github.com/MonitorControl/MonitorControl/wiki) - [ ] I have updated MonitorControl to the latest version **Describe the bug** A clear and concise description of what the bug is. **To Reproduce** Steps to reproduce the behavior: 1. Go to '...' 2. Click on '....' 3. Scroll down to '....' 4. See error **Expected behavior** A clear and concise description of what you expected to happen. **Screenshots** If applicable, add screenshots to help explain your problem. **Additional context** Add any other context about the problem here. **Environment Information (please complete the following information):** - macOS version: - MonitorControl version: - Monitor(s):

gitea-mirror

2026-05-05 05:44:09 -06:00

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gitea-mirror commented

2026-05-05 05:44:17 -06:00

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

Hi, does ddctl or m1ddc work with the display?

https://github.com/MonitorControl/MonitorControl/wiki/Advanced-Preferences

If so, MC should have no problem controlling the display. Please let me know if you have this issue still and can provide this info. I'll close the issue until that time. Thank you and sorry for responding so late!

@waydabber commented on GitHub (Aug 21, 2021): Hi, does ddctl or m1ddc work with the display? https://github.com/MonitorControl/MonitorControl/wiki/Advanced-Preferences If so, MC should have no problem controlling the display. Please let me know if you have this issue still and can provide this info. I'll close the issue until that time. Thank you and sorry for responding so late!

gitea-mirror commented

2026-05-05 05:44:18 -06:00

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@maxkusnetsov commented on GitHub (Sep 6, 2021):

Hi @waydabber, I have the same monitor and facing this issue as well.

My results with m1ddc:

Can control brightness: ./m1ddc set b 0 ./m1ddc set b 100 works correct. But ./m1ddc get b always returns -118;
As for volume, I can control only 'mute on/off', volume increasing/decreasing is not working. ./m1ddc get v always returns -118, ./m1ddc max b returns -85

macOS version: 12 Beta, M1
MonitorControl version: 3.0.0-RC

@maxkusnetsov commented on GitHub (Sep 6, 2021): Hi @waydabber, I have the same monitor and facing this issue as well. My results with m1ddc: 1. Can control brightness: `./m1ddc set b 0` `./m1ddc set b 100` works correct. But `./m1ddc get b` always returns -118; 2. As for volume, I can control only 'mute on/off', volume increasing/decreasing is not working. `./m1ddc get v` always returns -118, `./m1ddc max b` returns -85 macOS version: 12 Beta, M1 MonitorControl version: 3.0.0-RC

gitea-mirror commented

2026-05-05 05:44:21 -06:00

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@waydabber commented on GitHub (Sep 6, 2021):

Hi, can you control the brightness with MonitorControl? If you have issues with initial ddc read on startup, you can press Shift during startup for safe mode, enable Advanced... in General preferences and then set Polling to None under Displays.

@waydabber commented on GitHub (Sep 6, 2021): Hi, can you control the brightness with MonitorControl? If you have issues with initial ddc read on startup, you can press Shift during startup for safe mode, enable `Advanced..`. in General preferences and then set `Polling` to `None` under Displays.

gitea-mirror commented

2026-05-05 05:44:25 -06:00

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@maxkusnetsov commented on GitHub (Sep 6, 2021):

Hi, can you control the brightness with MonitorControl? If you have issues with initial ddc read on startup, you can press Shift during startup for safe mode, enable Advanced... in General preferences and then set Polling to None under Displays.

Yes. I tried every 'Polling' setting, but volume control still not working :( But brightness works correct

@maxkusnetsov commented on GitHub (Sep 6, 2021): > Hi, can you control the brightness with MonitorControl? If you have issues with initial ddc read on startup, you can press Shift during startup for safe mode, enable `Advanced..`. in General preferences and then set `Polling` to `None` under Displays. Yes. I tried every 'Polling' setting, but volume control still not working :( But brightness works correct

gitea-mirror commented

2026-05-05 05:44:27 -06:00

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@waydabber commented on GitHub (Sep 6, 2021):

Well, this is probably an issue with the display I am afraid then and probably can't be fixed on the software side. It's strange since Philips displays mostly support DDC-CI properly.

@waydabber commented on GitHub (Sep 6, 2021): Well, this is probably an issue with the display I am afraid then and probably can't be fixed on the software side. It's strange since Philips displays mostly support DDC-CI properly.

gitea-mirror commented

2026-05-05 05:44:30 -06:00

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@JayLiuX commented on GitHub (Feb 17, 2023):

I have the same problem that the volume cannot be adjusted. My 279C9 specification clearly states that it is compatible with the MacosX system, but I have no MacosX system computer. Its firmware should be available for Macosx, but I don't understand why it has problems for Macos13.
macOS 版本：13，M1 pro
MonitorControl 版本：4.1.0

@JayLiuX commented on GitHub (Feb 17, 2023): I have the same problem that the volume cannot be adjusted. My 279C9 specification clearly states that it is compatible with the MacosX system, but I have no MacosX system computer. Its firmware should be available for Macosx, but I don't understand why it has problems for Macos13. macOS 版本：13，M1 pro MonitorControl 版本：4.1.0

gitea-mirror commented

2026-05-05 05:44:34 -06:00

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@csz-Seven commented on GitHub (Feb 17, 2023):

这是来自QQ邮箱的假期自动回复邮件。

您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。

@csz-Seven commented on GitHub (Feb 17, 2023): 这是来自QQ邮箱的假期自动回复邮件。您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。