I just set up some Dell S2425 monitors, but I've noticed that the audio is automatically playing through their built-in speakers instead of using my computer's internal speakers. It seems Windows automatically switched the default audio device to the HDMI monitors without asking me. I'm looking for a way to use Group Policy (GPO) to either completely disable the audio on these monitors or to ensure that my built-in speakers are always the default. I've tried following some instructions to change the registry, but the GUIDs are different on various machines, making it tough to deploy it universally. Anyone got a reliable solution?
4 Answers
I'm pretty sure you can't handle this through GPO alone. It might be too broad and could cause issues if not managed carefully.
You can set this up through Group Policy. Navigate to Computer Configuration → Administrative Templates → System → Device Installation → Device Installation Restrictions. Enable "Prevent installation of devices that match any of these device IDs" and block the audio hardware ID of your monitors. You can find the ID by going to Device Manager, right-clicking on the monitor audio, selecting Properties, and then the Details tab to see the Hardware IDs.
I really don't think broad GPO settings are the way to go here. This needs finer control. Maybe consider filtering by Group or limiting it to specific OUs rather than applying it across the entire domain.
I have a script that disables audio output for NVIDIA devices, and you could adapt it to your needs for HDMI audio. You can deploy this script via GPO. Just tweak the filter to match your monitor's specifications. Here's an example command: `get-pnpdevice -class media | where {$_.FriendlyName -match "nvidia"} | disable-pnpdevice -confirm:$false`.
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