[Issue]: No Audio when physical monitor off

[Akki-K]

Describe the bug

There is no audio when the physical monitor is off. The audio is present while physical monitor is on.
I am new and don't know much knowledge about this. However i would appreciate your efforts.

Steps to reproduce

turning off physical monitor

Affected games

No response

Other Moonlight clients

None

Moonlight adjusted settings

None

Moonlight adjusted settings (please complete the following information)

No response

Moonlight default settings

Yes

Gamepad-related connection issue

No

Gamepad-related input issue

No

Gamepad-related streaming issue

No

Android version

Android 14

Device model

Redme pad SE

Server PC OS version

Windows 11

Server PC GeForce Experience version

No response

Server PC Nvidia GPU driver version

No response

Server PC antivirus and firewall software

No response

Screenshots

No response

Relevant log output

No response

Additional context

No response

[ClassicOldSong]

If you have installed Steam and enabled Install Steam Audio Drivers, you should get audio when your monitor is off.

[bernhardberger]

I can confirm this issue (using W11 24H2 - works in Steam Link, but not in Moonlight/Apollo).

When the physical monitor turns off the audio device somehow gets in an unassigned state. Steam Audio driver is present on the system but cannot be chosen (and is invisible in the Audio tab).

I worked around this by installing a virtual audio driver (VAC / Virtual Audio Cable) and using this as the virtual sink instead.

[ClassicOldSong]

Have you enabled "Keep virtual sink as default" in Audio/Video tab?

[bernhardberger]

Have you enabled "Keep virtual sink as default" in Audio/Video tab?

Yes.

It used to work fine before, but it at some point in the past 2 weeks stopped working properly. I don't know if it was the 24H2 update or a steam update, though.

[ClassicOldSong]

Steam didn't update their virtual audio driver since 2017, it's likely another windows upgrade regression then..

Also remember don't put on your headphones until it makes a sound, I have been boomed by the largest volume several times using Windows recently... Fortunately I pulled the headphones off fast enough so I only got a temporary hearing loss🥲