[GH-ISSUE #1332] dell u2419hc and dell s2721dgf #759

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opened 2026-05-05 06:38:37 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:38:37 -06:00

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Originally created by @plsdice on GitHub (Mar 10, 2023).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1332

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

hi there.

I run this app connected to the monitors above. the brightness control works fine however the volume control doesnt seem to affect the plugged in devices.

I have experimented with both hdmi and thunderbolt 3 for this

Expected behavior

I would expect the device connected over 3.5mm to either of these devices to reduce its volume however this does not happen. the ui appears but the volume maintains.

Anything else?

No response

Environment Information (please complete the following information)

- macOS version: 13.1
- Mac model: M1 Pro 14
- MonitorControl version: 4.1.0
- Monitor(s): u2419hc.  s2721dgf
- Monitor Cable(s)/Connection(s): usbc and hdmi
- Apple Silicon/M1 (yes or no): yes M1 Pro

Originally created by @plsdice on GitHub (Mar 10, 2023). Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1332 ### 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 hi there. I run this app connected to the monitors above. the brightness control works fine however the volume control doesnt seem to affect the plugged in devices. I have experimented with both hdmi and thunderbolt 3 for this ### Expected behavior I would expect the device connected over 3.5mm to either of these devices to reduce its volume however this does not happen. the ui appears but the volume maintains. ### Anything else? _No response_ ### Environment Information (please complete the following information) ```markdown - macOS version: 13.1 - Mac model: M1 Pro 14 - MonitorControl version: 4.1.0 - Monitor(s): u2419hc. s2721dgf - Monitor Cable(s)/Connection(s): usbc and hdmi - Apple Silicon/M1 (yes or no): yes M1 Pro ```

gitea-mirror closed this issue

2026-05-05 06:38:40 -06:00

gitea-mirror commented

2026-05-05 06:38:42 -06:00

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Owner

@waydabber commented on GitHub (Mar 10, 2023):

You are either using HDMI which is not supported in MonitorControl (you can use BetterDisplay for that) or the display does not support DDC or if hardware brightness works then it does not support DDC volume.

@waydabber commented on GitHub (Mar 10, 2023): You are either using HDMI which is not supported in MonitorControl (you can use BetterDisplay for that) or the display does not support DDC or if hardware brightness works then it does not support DDC volume.