The sound on the server is broken

[lumer1020]

Hi!

No, the sound does not work outside the session in any way at all – and via HDMI. There is no sound outside the NoMachine session and it cannot be disabled.

5.19.0-46-generic – kernel version

 

[lumer1020]

Do I understand correctly that there is no solution except kernel downgrade?

[Britgirl]

You can try to see if that helps.

[lumer1020]

I can’t, because it could destroy all my work. Are you looking for any other solutions to the problem?

[lumer1020]

Is there any news?

Can you please upload here the error you found in the log?

[kubaszym1]

Hi,

The error while unmuting is the following:

amixer: Control sysdefault:0 element write error: Operation not permitted

I checked on my machine that this error occurs when you use HDMI device and a new kernel.

Regards,

Kuba

[fisherman]

Please can you try to change key AudioInterface in node.cfg
AudioInterface pipewire

and then restart NoMachine server using
sudo /etc/NX/nxserver --restart

[lumer1020]

This is one of the first options I tried. Anyway now it didn’t help either

[kubaszym1]

Hi,

I would like to order things up to determine whether the bug is in Ubuntu or in NoMachine. If I understand correctly, the audio doesn’t work at all after NoMachine installation. Is it impossible to set it again from system settings? Have you tried restarting pulseaudio or alsa? It seems very strange that the sound is broken even if NoMachine is disabled. Even if the sound from the HDMI speaker is broken, you should be able to hear the audio from the default speaker (built-in device in your laptop). Have you tried to achieve working sound with another speaker (i.e. headphones?). You can uninstall NoMachine, restart your computer and check if that changes something. Also, I found a possible way to deal with such issues on Ubuntu although I’m not sure if it’ll work for you:

sudo nano /etc/default/grub

Change:

GRUB_CMDLINE_LINUX=”” to GRUB_CMDLINE_LINUX=”intel_iommu=on,igfx_off”

Save file and update grub:

sudo update-grub

reboot

If you use NVIDIA drivers, you may need to update them. Go to Software & Updates -> Additional Drivers and check if an update for NVIDIA drivers is available.

Regards,

Kuba

 

[lumer1020]

Sound does not work anywhere – not directly in the laptop, not through headphones, not through HDMI, with everything in the settings shows as if there is sound, but from the speakers it does not come.

Your colleague was able to reproduce the problem – a bug in NoMachine which is not coping with a server that has HDMI connected.

I have tried all known methods from the Internet for sound problems in Ubuntu – it didn’t help.

I have searched your entire forum and found a similar problem – it is also unsolved in the threads there.

Your last suggested method with grub did not help.

I noticed that if I set the sound to hdmi in the settings and try and try to change the configuration – the output device flies to the laptop. And at the same time when selecting the output device on hdmi, the configuration selection disappears.

Attachments:

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[distearth]

Hi,

I’m having the same problem but no external monitor.

[Britgirl]

Hi distearth, please provide details of your set up (Linux distribution, version, desktop environment etc etc), and steps to reproduce. This could be a different issue and in that case I will split your issue off from this one.

[kubaszym1]

Hi,

As far as I understand, you are still using pipewire sound server. You can just try to restart it this way:

systemctl –user –now restart pipewire.{service,socket}

Please pay attention to the output of command “pactl info”. Server String should be /run/user/1000/pulse/native and Server Name should be PulseAudio (on PipeWire 0.3.x). If the Server String is not set properly, you can set it manually this way:

export PULSE_SERVER=/run/user/1000/pulse/native

You are probably using WirePlumber as your session manager. You can check if it runs properly by running wpctl status. In the output you should see something like this:

Settings
└─ Default Configured Node Names:
0. Audio/Sink    alsa_output.pci-0000_00_1b.0.analog-stereo
1. Audio/Source  alsa_input.pci-0000_00_1b.0.analog-stereo.37

If no sinks are set as default, you can set them this way:

wpctl set-default <node-id>

You can see the node ids in the Audio Sink/Sources section of the “wpctl status” output.

Regards,

Kuba

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