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[GH-ISSUE #1114] Dell U2520D volume control is not working #658

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opened 2026-05-05 06:27:37 -06:00 by gitea-mirror · 8 comments

gitea-mirror commented

2026-05-05 06:27:37 -06:00

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Originally created by @LightmoonXD on GitHub (Jul 13, 2022).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1114

Before opening the issue, have you...?

Searched for existing issues
Read through the Monitor-Troubleshooting Wiki
Updated MonitorControl to the latest version (if applicable)

Describe the issue

Volume control isnt working while seeing the volume variation via native macos volume panel.i am sure DDC is working well.
The brightness control is fine.
Mac->U2520D->external speaker with USB and 3.5mm audio output

Expected behavior

Adjusting volume.

Anything else?

No response

Environment Information (please complete the following information)

- macOS version:11.4 Big Sur
- Mac model:Macbook Pro (15-inch,mid 2014)
- MonitorControl version:4.1.0 version 7034
- Monitor(s):DELL U2520D
- Monitor Cable(s)/Connection(s):Mac->DP2.1->DELL U2520D
- Apple Silicon/M1 (yes or no):no

Originally created by @LightmoonXD on GitHub (Jul 13, 2022). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1114 ### Before opening the issue, have you...? - [X] Searched for existing issues - [X] Read through [the Monitor-Troubleshooting Wiki](https://github.com/MonitorControl/MonitorControl/wiki/Monitor-Troubleshooting) - [X] Updated MonitorControl to the latest version (if applicable) ### Describe the issue Volume control isnt working while seeing the volume variation via native macos volume panel.i am sure DDC is working well. The brightness control is fine. Mac->U2520D->external speaker with USB and 3.5mm audio output ### Expected behavior Adjusting volume. ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version:11.4 Big Sur - Mac model:Macbook Pro (15-inch,mid 2014) - MonitorControl version:4.1.0 version 7034 - Monitor(s):DELL U2520D - Monitor Cable(s)/Connection(s):Mac->DP2.1->DELL U2520D - Apple Silicon/M1 (yes or no):no ```

gitea-mirror closed this issue

2026-05-05 06:27:39 -06:00

gitea-mirror commented

2026-05-05 06:27:43 -06:00

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@1P1E10 commented on GitHub (Jul 18, 2022):

Doesn't work for my Benq PD2705U neither.

@1P1E10 commented on GitHub (Jul 18, 2022): Doesn't work for my Benq PD2705U neither.

gitea-mirror commented

2026-05-05 06:27:45 -06:00

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@myzinsky commented on GitHub (Jul 19, 2022):

Same here with DELL U2722DE

@myzinsky commented on GitHub (Jul 19, 2022): Same here with DELL U2722DE

gitea-mirror commented

2026-05-05 06:27:47 -06:00

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@xmollv commented on GitHub (Jul 21, 2022):

I've the same issue with a DELL U2723QE. Brightness works fine, audio doesn't.

@xmollv commented on GitHub (Jul 21, 2022): I've the same issue with a DELL U2723QE. Brightness works fine, audio doesn't.

gitea-mirror commented

2026-05-05 06:27:49 -06:00

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@waydabber commented on GitHub (Jul 21, 2022):

Many displays support brightness control only via DDC and no volume control. My display (Lenovo Creator Extreme) also has no volume controls via DDC. So I guess I'll join the list. ;)

@waydabber commented on GitHub (Jul 21, 2022): Many displays support brightness control only via DDC and no volume control. My display (Lenovo Creator Extreme) also has no volume controls via DDC. So I guess I'll join the list. ;)

gitea-mirror commented

2026-05-05 06:27:51 -06:00

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@myzinsky commented on GitHub (Jul 21, 2022):

So @tucknology's work-around is great. If that would be integrated also in the monitorControl tool that would be really handy!

@myzinsky commented on GitHub (Jul 21, 2022): So @tucknology's work-around is great. If that would be integrated also in the monitorControl tool that would be really handy!

gitea-mirror commented

2026-05-05 06:27:53 -06:00

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@Fudal commented on GitHub (Jul 22, 2022):

I've the same issue with a Dell S2721H. Brightness works fine, audio doesn't. Connected through HDMI.

@Fudal commented on GitHub (Jul 22, 2022): I've the same issue with a Dell S2721H. Brightness works fine, audio doesn't. Connected through HDMI.

gitea-mirror commented

2026-05-05 06:27:57 -06:00

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@1P1E10 commented on GitHub (Jul 22, 2022):

I've the same issue with a Dell S2721H. Brightness works fine, audio doesn't. Connected through HDMI.

I connected via type c

@1P1E10 commented on GitHub (Jul 22, 2022): > I've the same issue with a Dell S2721H. Brightness works fine, audio doesn't. Connected through HDMI. I connected via type c

gitea-mirror commented

2026-05-05 06:27:58 -06:00

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@waydabber commented on GitHub (Jul 26, 2022):

Audio control via HDMI will not work as HDMI on Mac blocks DDC. Otherwise these are possibly display firmware issues.

I'll move this thread over to discussions so everybody can chime in with their display.

@waydabber commented on GitHub (Jul 26, 2022): Audio control via HDMI will not work as HDMI on Mac blocks DDC. Otherwise these are possibly display firmware issues. I'll move this thread over to discussions so everybody can chime in with their display.