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[GH-ISSUE #1745] Volume control does not work #966
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Reference: github-starred/MonitorControl#966
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Originally created by @julien-cb on GitHub (Apr 1, 2025).
Original GitHub issue: https://github.com/MonitorControl/MonitorControl/issues/1745
Before opening the issue, have you...?
Describe the bug
Volume control was working fine with my M2 Pro Macbook Pro connected to an LG monitor via HDMI>USB-C (usb-c port on laptop), but starting yesterday it stopped. The volume icons show up correctly but volume doesn't change. I'm on MacOs 15.3.2. Any insight?
When I try with BetterDisplay, same issue and it shows no DDC capabilities. However brightness control works fine.
Steps to reproduce
Change volume using keyboard
Expected behavior
Volume changes on external monitor speakers
Anything else?
No response
Environment Information (please complete the following information)
@brycedhall commented on GitHub (Apr 4, 2025):
I am having the same issue. M1 Macbook Pro. USB C > DIsplayPort. MacOS 15.4 (24E247)
On MonitorControl 4.3.3
@seedds commented on GitHub (Apr 5, 2025):
Volume control is also not working on Dell U2725QE with MonitorControl 4.3.3 Build 7123
@tollspattern commented on GitHub (Apr 8, 2025):
Volume control is also not working on a Dell U4025QW
@deant89 commented on GitHub (Apr 11, 2025):
Same issue - M3 Pro - 15.3.1
@nawfff commented on GitHub (Apr 11, 2025):
Same issue on LG Ultrawide (34WP75C) monitor with M2 MacBook Air 14.4 plugged in via USB-C
@OSS117-for-ever commented on GitHub (Apr 12, 2025):
For info, Mac Mini M4 Pro with macOs 15.3.2
Monitor Control 4.3.3
DELL S2725QC (great sound) connected in USB-C
Keyboard MX Keys
The volume control works for me
@OSS117-for-ever commented on GitHub (Apr 12, 2025):
Check in your monitor OSD if the DDC/CI is activated...
@julien-cb commented on GitHub (Apr 12, 2025):
There is no such setting in my LG monitor
@nK06 commented on GitHub (Apr 15, 2025):
Volume control is also not working on a Dell U2720QM,
M4 mac mini with 15.4
@bujingyu-241203 commented on GitHub (Apr 18, 2025):
Volume control is also not working on innocn 27M2U-D with MonitorControl 4.3.3 Build 7123
@grafviktor commented on GitHub (Apr 23, 2025):
Volume control is not working on Mac mini m4, macOS 15.3.2 with screen model Lenovo L24q-35 (HDMI). MonitorControl version is 4.3.3 Build 7123.
@sltnsrh commented on GitHub (Apr 25, 2025):
Issue observed on:
Problem: MonitorControl sound control sometimes fails to work with the monitor. Occasionally, it works as expected, but other times it doesn’t respond until I reconnect the monitor—either by physically unplugging and replugging the USB-C cable, or by switching to a different input source from the monitor’s display menu and then back to USB-C.
@gastypm commented on GitHub (May 3, 2025):
Audio control not working on Dell U2723QE
Brightness control works flawlessly, but I can't get audio control to work. When I press the volume keys I can see the volume UI changing but the audio volume itself stays the same. Already tried restarting, reconnecting and reactivating DDC/CI on the monitor.
@bernesto commented on GitHub (May 23, 2025):
Having the same issue. Audio brightness both show the OSD, but no audio changes (volume or mute) and brightness only works with software. Settings shows control method "Hardware (DDC)".
@wagaman commented on GitHub (May 27, 2025):
For those who struggle, you can get Soundsource and enable Super Volume Keys which works for Dell Monitors. However, that software is not for free tho.
@OSS117-for-ever commented on GitHub (May 29, 2025):
For info, Mac Mini M4 Pro with macOs 15.5
Monitor Control 4.3.3
DELL S2725QC (great sound) connected in USB-C
Keyboard MX Keys
The audio and brightness controls works for me in menu bar and with the dedicated keys on my Logitech keyboard
Below my settings in the App
@dhruvkb commented on GitHub (Jun 17, 2025):
With a Dell U4025QW, the volume slider in the app works perfectly when clicking the desired volume with the mouse. The volume is immediately synced with the hardware configuration menu (even better than Dell's DDPM software which is noticeably laggy).
My keyboard is surely sending the "Volume up", "Volume down" and "Mute" keys as they used to work on MacBook Pro's own speakers as well as a previous LG Ultrafine 5K display. But the keyboard controls don't work with MonitorControl. The macOS volume overlay doesn't appear, there is no response and the volume doesn't change.
Version 4.3.3 Build 7123
Update: DDPM was running in the background and preventing the keypresses from being read. Quitting that and only running MonitorControl fixed the issue.
@The-Magicians-Code commented on GitHub (Aug 4, 2025):
Raising the same problem:
The settings in question:
Reproduce:
The volume control works fine until you lower it to zero. After that adjusting the volume slider is active and monitor is also showing a volume value, but no sound is being emitted through the external speakers attached to the monitor. The sound became audible when muting and unmuting the sound manually in the monitor's OSD settings. No need to kill the app or replug the monitor.
My best guess is that there is a value indicating mute triggering every time the volume is being adjusted to zero.
@waydabber commented on GitHub (Aug 4, 2025):
@The-Magicians-Code - I'd recommend using BetterDisplay as it has a lot of additional options to configure how Mute should work. All MonitorControl features are available in the app for free. https://github.com/waydabber/BetterDisplay/issues/1248
@JiPengLin commented on GitHub (Aug 11, 2025):
Same Issue on Dell U2723QE with MacOS tahoe and I petty sure I open the monitor DDC/CI switch
@behlersyeg commented on GitHub (Aug 17, 2025):
Samsung ViewFinity S6 running through a UGreen KVM switch.
Audio works fine over HDMI.
Installed MonitorControl. Brightness controls work fine.
When I adjust the volume using the keyboard, the volume setting drops to a low level. Toggling the volume up raises the volume, but it never reaches the same loudness even after setting it to 100%. If I hit mute, the sound goes away, but never comes back, even after maxing it out again. Disabling MonitorControl does not restore audio and a reboot is required.
@waydabber commented on GitHub (Oct 23, 2025):
@42648594 - I just want to reiterate that all features found in MonitorControl are free in BetterDisplay, no payment or license required. Also there is no nag screen of any kind to make one pay. This is why I think it is fair to recommend the app. I do not expect MonitorControl users to get a Pro license. BetterDisplay is freemium, so you can use many features for free and some advanced features require a Pro license.
@dartiss commented on GitHub (Oct 25, 2025):
Hi,
I have an ASUS monitor which this software doesn't control the volume for.
@sandboks commented on GitHub (Dec 9, 2025):
I'm experiencing the same issue only after updating from 4.2 to 4.3.3. It worked absolutely fine before updating. Now, the volume keys (volume up, down, and mute) are completely nonfunctional for my monitor. I get the volume popup in the top right corner, but nothing changes.
Opening the panel and dragging the slider works, but the buttons do nothing.
EDIT: reverting to version 4.2 restored the functionality. These buttons work as expected and I'm not experiencing any issues in functionality, just the volume popup no longer displaying properly on MacOS26.
@JiPengLin commented on GitHub (Dec 23, 2025):
Hi guys, I used Gemini 3.0 Pro to build this simple Swift script. I hope it proves helpful for others!
https://github.com/JiPengLin/MonitorAudioBridge-macOS
@eccen commented on GitHub (Feb 5, 2026):
I noticed my keyboard sound control was sporadically working with a MacBook Pro M1 connected via DisplayPort to a Dell S2725QS. It turns out that the focus has to be on the external monitor for the volume controls to work. For example, if I have my mouse on the laptop screen, the keyboard volume controls do nothing, but if I move the mouse onto the external screen, they work to control the external screen volume. Is there a way to have them always control the volume regardless of focus or output device?