Can’t connect to the NoMachine server after moving to a new server

[iv]

Dear NoMachine team,

I was successfully using headless-Ubuntu desktop from OS X with NoMachine. But after moving to a new IP address (because of mispayment some day for my cloud service) I can’t connect with password authentication to headless-Ubuntu via NoMachine anymore.

My hell loop:

First time NoMachine has several unsuccessful attempts to connect and eventually fails with the logs which is attached in file with name R-localhost-2009-6F16A8577822C9376F9F13DC2068B6D3 .

All further attempts to connect finish with the message <No available desktops on this server> .

Here is a list what I tried, but it didn’t help:

1) sudo /etc/NX/nxserver –restart
2) reinstallation of NoMachine on server side
3) editing DefaultDesktopCommandefault at /usr/NX/etc/node.cfg into all possible options.

NoMachine version: Version 8.2.3
Ubuntu version: Ubuntu 20.04.5 LTS
Ubuntu available desktops:
$ grep ^Exec /usr/share/xsessions/*.desktop

• /usr/share/xsessions/gnome.desktop:Exec=/usr/bin/gnome-session --session=gnome
• /usr/share/xsessions/gnome-xorg.desktop:Exec=/usr/bin/gnome-session --session=gnome
• /usr/share/xsessions/ubuntu.desktop:Exec=env GNOME_SHELL_SESSION_MODE=ubuntu /usr/bin/gnome-session --systemd --session=ubuntu

 

Attachments:

1. R-localhost-2009-6F16A8577822C9376F9F13DC2068B6D3.zip

[katpan]

Dear iv,

In order to investigate, we need the logs from server side.

More info on how to collect logs here in this article: https://kb.nomachine.com/AR10K00697?s=%20how%20to%20collect%20logs

Can you please send them by email to forum[at]nomachine[dot]com, making sure to reference the topic as the subject of the email?

 

Thanks!

[iv]

Dear katpan,

I’ve sent logs to the email which you provided. But I’m not sure if it was delivered. Let me know if there are some problems.

[katpan]

Hello,

I confirm we received the logs, and we are investigating the issue.

Thank you for your patience 🙂

[fra81]

Hi iv,

please try to run this command on the server machine and tell us if it reports any error:

sudo /etc/NX/nxserver --eglcapture yes

Then restart the display manager and the NoMachine server to make changes effective:

sudo systemctl restart display-manager
sudo /etc/NX/nxserver --restart

Let us know if that solves the problem.

[iv]

Thank you!

This solved my problem 🙂

[iv]

I was using NoMachine for sometime, after I had run your commands. But I was suffered with double login screens and systematic faults of Ubuntu OS.
Then I found out that I had gdm3 proceess in processes tree with systemd parent process.

So, I ran:

sudo systemctl stop gdm

then turned off eglcapture with command:

sudo /etc/NX/nxserver –eglcapture no

and restarted nxserver.

Now it seems that everything works OK. I suppose that your solution can be called temporary, but mine should help for using headless OS in more reliable and stable way.

 

 

[Britgirl]

Launching the command we suggested would have allowed for further debugging, but disabling -egl completely obviously removes the root problem. Thanks for the update.

[Author]

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