No sound client on NoMachine 9

[mckaygerhard]

I upgrade only two host. My Linux client machine and the two remote machine. All the NoMachine 6.X host adn clients works audio and 8.X host and client also works audio perfectly. When I try to connect with nomachine 9 to any other no matter if are older or newer there is no sound

log (always same on any connection)

Info: Slave server running with pid 3184541.

Info: Listening to slave connections on port 25001.

Info: Starting NoMachine Monitor version ‘9.0.188’.

Info: Loaded translation files for ‘English’.

3184534 3184534 2025-06-14 12:28:34 989.085 OsDetect: Setting os type to ‘Debian’.
3184534 3184534 2025-06-14 12:28:34 989.106 Main: Creating a new connection monitor.
3184534 3184616 2025-06-14 12:28:35 160.141 AudioIoPulseaudioServer: WARNING! Cannot connect to PulseAudio server.
3184534 3184616 2025-06-14 12:28:35 160.169 AudioIoPulseaudioServer: Failed to get devices list.
3184534 3184534 2025-06-14 12:28:35 538.142 MonitorService: Enabled drag and drop feature.

My os client is Debian 12, but i also try on Arch linux agains Debian 9 client and seems not work:

REMOTE DEVICE Arch 2025

NoMachine 9.0.188
Arch 2025
Pulseaudio workiing and nomachine reports sound

[general@arshit Devel]$ pacmd list-sinks | grep NoMachine
<span style=”white-space: normal;”> device.description = “NoMachine Output”
</span>[general@arshit Devel]$

CLIENT connected Debian 10

NoMachine 9.0.188

Info: Starting NoMachine version 9.0.188.

Info: Loading settings from ‘/home/general/.nx/config/player.cfg’.

Info: Loaded translation files for ‘English’.

3273719 3273719 2025-06-14 12:40:49 190.432 Main: Creating the client session.
3273719 3273719 2025-06-14 12:40:49 190.488 ClientSession: Initializing session at 0x20216fe0.
3273719 3273719 2025-06-14 12:40:49 296.253 AudioIoPulseaudioServer: WARNING! Cannot connect to PulseAudio server.
3273719 3273719 2025-06-14 12:40:49 296.280 AudioIoPulseaudioServer: Failed to get devices list.
3273719 3273719 2025-06-14 12:40:49 296.438 AudioIoPulseaudioServer: WARNING! Cannot connect to PulseAudio server.
3273719 3273719 2025-06-14 12:40:49 296.449 AudioIoPulseaudioServer: Failed to get devices list.
3273719 3273719 2025-06-14 12:40:49 296.451 AudioProxyCore: WARNING! Audio engine reported empty list.
3273719 3273719 2025-06-14 12:40:49 296.453 ClientAudio: WARNING! Could not query device settings.
3273719 3273719 2025-06-14 12:40:49 296.479 ClientAudio: WARNING! There are no audio devices available.
3273719 3273719 2025-06-14 12:40:49 296.486 ClientAudio: WARNING! There are no audio devices available.
3273719 3273719 2025-06-14 12:40:49 296.546 ClientSession: Initialized session at 0x20216fe0.
3273719 3273719 2025-06-14 12:40:49 298.861 ClientSession: Starting session at 0x20216fe0

You should noted the line “AudioIoPulseaudioServer: Failed to get devices list.” is clear into your code its not to difficult to guess that in such case just report empty list so inside client the available devices will be “none”

I downgrade to 8.16 and client start to works. I already saved in each update for each OS in those cases. We have 3 weeks of several reports of fails in NoMachine 9

I hope this problem get solved cos NoMachine is more light and easy to use and provides several features now in v9. And the most important! NoMachine supports a wide variation of OS including older ones! Good one!

[Author]

Posts