Trouble getting NoMachine to work

[2000b]

Hi, I have installed Cyberpanel on my Ubuntu 20.04, which runs on Google Cloud. Normally Ubuntu was running fine with NoMachine as I would connect to it. But now, it cannot connect to NoMachine. I asked ChatGPT to help me to no avail. Here’s a log.

Info: Starting NoMachine version 8.16.1.
Info: Loading settings from ‘C:\Users\blurp\.nx\config\player.cfg’.
Info: Loaded translation files for ‘English’.
29848 32500 2025-04-19 11:44:22 472.715 Main: Creating the client session.
29848 32500 2025-04-19 11:44:22 472.715 ClientSession: Initializing session at 0x0000000003b07f70.
29848 32500 2025-04-19 11:44:22 702.967 ClientSession: Initialized session at 0x0000000003b07f70.
29848 32500 2025-04-19 11:44:22 705.974 ClientSession: Starting session at 0x0000000003b07f70.
29848 32500 2025-04-19 11:44:22 709.973 ClientSession: Going to start session ‘C:\Users\blurp\Documents\NoMachine\Ubuntu.nxs’.
29848 32500 2025-04-19 11:44:22 729.850 Connection: Initializing connection at 0x0000000006557be0.
29848 32500 2025-04-19 11:44:22 735.909 Connection: Initialized connection at 0x0000000006557be0.
29848 32500 2025-04-19 11:44:22 735.909 Connection: Starting connection at 0x0000000006557be0.
29848 32500 2025-04-19 11:44:22 735.909 ClientDaemonConnector: Starting a new connection to host ‘xx.xx.xx.x’ on port ‘4000’.
29848 32500 2025-04-19 11:44:22 736.904 Connection: Started connection at 0x0000000006557be0.
29848 32500 2025-04-19 11:44:22 745.066 ClientSession: Started session at 0x0000000003b07f70.
Info: Slave server running with pid 30128.
Info: Listening to slave connections on port 50715.
29848 32500 2025-04-19 11:44:22 789.907 Main: Entering the GUI event loop.
Info: Connection to xx.xx.xx.x port 4000 started at 11:44:22 796.763.
29848 27560 2025-04-19 11:44:23 510.948 ClientSession: A valid certificate for this server was found.
29848 32500 2025-04-19 11:46:23 523.658 Connection: WARNING! Ignoring the I/O error and waiting for the daemon error reporting.
Info: Connection to xx.xx.xx.x port 4000 closed at 11:46:23 525.368.
29848 32500 2025-04-19 11:46:23 528.372 Connection: Connection at 0x0000000006557be0 failed.
29848 32500 2025-04-19 11:46:23 528.372 ClientSession: Runnable at 0x0000000006557be0 caused the session at 0x0000000003b07f70 to fail.
29848 32500 2025-04-19 11:46:23 528.372 ClientSession: Failing reason is ‘The connection with the server was lost’.
29848 32500 2025-04-19 11:46:23 570.884 ClientSession: Stopping session at 0x0000000003b07f70.
29848 32500 2025-04-19 11:46:23 587.259 ClientSession: Destroying display client.
Info: Slave server running with pid 10432.
Info: Listening to slave connections on port 58565.
29848 32500 2025-04-19 11:46:23 641.231 Connection: Stopping connection at 0x0000000006557be0.
29848 32500 2025-04-19 11:46:23 641.231 ClientDaemonConnector: Stopping the current connection.
29848 32500 2025-04-19 11:46:23 642.739 Connection: Stopped connection at 0x0000000006557be0.
29848 32500 2025-04-19 11:46:23 657.782 ClientSession: Stopped session at 0x0000000003b07f70.

[Britgirl]

Hi, for sure it’s related to the server, something has changed on Ubuntu side in Google Cloud, but it’s hard to say exactly what without seeing the logs. Please follow the instructions here to enable debug in the NoMachine server. Reproduce the problem by trying to connect, then gathering the logs. You can extract them using the instructions here: https://kb.nomachine.com/DT07S00243

Send them to forum[at]nomachine[dot]com. Please use the title of this topic as the subject of your email. Thanks!

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