[GH-ISSUE #163] Issues with DELL U3419W #120

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opened 2026-05-05 05:06:17 -06:00 by gitea-mirror · 2 comments

gitea-mirror commented

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

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Originally created by @funkyboy on GitHub (Dec 24, 2019).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/163

This is funny.

Everything works as expected when the monitor is connected to an old Mac mini, which has a mini display port.
Nothing works when the same monitor is connected to a Mac Book Pro (13-inch, 2018, Four Thunderbolt 3 Ports) via any of the thunderbolt ports.
Nothing works = the UI shows the progress bars for both brightness and volume but neither brightness nor volume values actually change (neither using the keyboard shortcuts, nor using the sliders in the menu bar app).

In both cases I am using the same HDMI port. Both machines run macOS 10.14.6.

Happy to provide more details if needed. If you have an idea of how I could start investigating this, please let me know.

Originally created by @funkyboy on GitHub (Dec 24, 2019). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/163 This is funny. Everything works as expected when the monitor is connected to an old Mac mini, which has a mini display port. Nothing works when the same monitor is connected to a Mac Book Pro (13-inch, 2018, Four Thunderbolt 3 Ports) via any of the thunderbolt ports. Nothing works = the UI shows the progress bars for both brightness and volume but neither brightness nor volume values actually change (neither using the keyboard shortcuts, nor using the sliders in the menu bar app). In both cases I am using the same HDMI port. Both machines run macOS 10.14.6. Happy to provide more details if needed. If you have an idea of how I could start investigating this, please let me know.

gitea-mirror closed this issue

2026-05-05 05:06:19 -06:00

gitea-mirror commented

2026-05-05 05:06:22 -06:00

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@JoniVR commented on GitHub (Feb 2, 2020):

First thing you should definitely try in this case is a different cable when possible. You could be unlucky and have an unsupported display but in quite a lot of cases HDMI doesn't work while something like displayport does.

@JoniVR commented on GitHub (Feb 2, 2020): First thing you should definitely try in this case is a different cable when possible. You could be unlucky and have an unsupported display but in quite a lot of cases HDMI doesn't work while something like displayport does.

gitea-mirror commented

2026-05-05 05:06:24 -06:00

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@funkyboy commented on GitHub (Feb 2, 2020):

Thanks for your help. I ended up returning the monitor because it didn’t fit my needs :(

@funkyboy commented on GitHub (Feb 2, 2020): Thanks for your help. I ended up returning the monitor because it didn’t fit my needs :(

gitea-mirror referenced this issue

2026-05-05 05:23:01 -06:00

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gitea-mirror referenced this issue

2026-05-05 05:30:20 -06:00

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