Most server-side apps don’t see microphone

[electrosaur]

Server: NoMachine 6.2.4 free version on headless CentOS 7 VM (VMware)

Client: NoMachine macOS6.2.4

When I enable the microphone, it shows up on server as pulseaudio source. I can record audio via Audacity. However, most applications – browsers, Slack, WebEx, etc. don’t see the microphone. http://test.webrtc.org says “Failed to access your computer’s camera and microphone (NotFoundError: Requested device not found).”.

Finally discovered a way around this: remap the NoMachine pulseaudio source.

pactl load-module module-remap-source master=nx_voice_out.monitor source=Microphone

I don’t know why this works: I’m not remapping any source properties, just creating an “alias”.

However, sometimes pulseaudio suspends the remapped source with reason IDLE and then I can’t unsuspend it. To avoid that I’m unloading the suspend-on-idle module:

pactl unload-module module-suspend-on-idle

Looking for a fix that does not involve these magic incantations.

[Britgirl]

Hi, we have opened a Trouble Report which you can find here: https://www.nomachine.com/TR10P08892.

Please use the ‘notify me’ tool to know when a patch has been released.

[electrosaur]

The TR doesn’t quite capture my problem(s). Please see my other post re. recreating NoMachine sources and sinks as well – its not just that things get suspended, its that they disappear altogether. Its simple enough to avoid the suspend-on-idle: one can simply unload the module immediately after remoting in via pactl module-unload module-suspend-on-idle.

Also the recipe I describe, of creating an “alias” for the microphone via module-remap-source doesn’t seem to work all the time. I’m unable to figure out what make it work or not work.

[Britgirl]

After looking at the additional information you sent us via email, it appears to be a problem with the order of recording devices in CentOS which is set in Audio Setup > Audio Recording. As a workaround you could try changing this order so that NoMachine Microphone is in first position. After this, the microphone feature should work.

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