No Lock Screen button

[pdb]

Using: Windows client, Linux virtual desktop, Mate desktop.

The Desktop User Guide mentions a Lock Screen button.
But it does not show up in the list of items when I try to add it to the Panel.

How to get this button?

 

 

[Britgirl]

Can you point us to the guide you are referring to? Perhaps you mean the blank screen feature which is for blanking the physical display of the target host?

https://www.nomachine.com/support/documents/protecting-the-host-screen-during-a-remote-control-session

[pdb]

Right click panel, Help, Buttons, Lock Screen Button.

Attachments:

1. 

   nm_lock_screen_button.png
   

[Britgirl]

This looks related to the desktop, and not caused by NoMachine. Run gnome-extensions list -d to know what shell extension is installed and its version.

[pdb]

Using Mate, not Gnome.
gnome-extensions not found.

[Britgirl]

Apologies, you already mentioned it was Mate. We’re not able to reproduce this issue at all. Can you send us the client-side logs to start with? Connect to the problematic desktop, open the NoMachine connection menu (Ctrl-Alt-0) > Connection Info > Take logs. Send us that file, please. You can attach it here or send direct to forum[at]nomachine[dot]com.

[pdb]

File attached.

Attachments:

1. lapps06-logs-2026-04-02-13.46.59.zip

[Britgirl]

It seems this is caused by Mate and not NoMachine. Try using a later version of Mate (>1.24) if possible.

[pdb]

Will try a newer version of Mate.
We are using RHEL8, and it seems there are no newer Mate versions on this distro.
So, we would first need to migrate to RHEL9. We are actually planning to do that anyway, but later this year.
Anyway, thanks for the support!

[Author]

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