White window when running X11 app

[jeh2019]

I installed NoMachine server on a Linux server ( SLES 11.4) and NoMachine client (6.8.1) on a Windows 7 PC to see if it can replace another software package that we are currently using to run a X11 app. I can log into the Linux server however when I launch X11 apps (xclock and xeyes) they run and display on the client but they are laying on top of each other and don’t appear in a window with borders so I can move them around. When I try to run my application all I get a is a white window. Any assistance would be appreciated.

[graywolf]

Are you trying a Custom, Single application, Floating window session?

Could you try a different client host (Linux, if possible) and see if you get the same result?

[jeh2019]

I don’t understand the first question. Where do I determine the Window session? I can’t use a different client.

[graywolf]

Press Ctrl+Alt+0 in the NoMachine client, while the remote session is connected. Menu shows up, then click on Connection. Read the session type there.

[jeh2019]

Session Type : Physical desktop

[graywolf]

So the physical screen of the server would show the same problem. Is the server headless, with display manager turned off? In such a case NoMachine would ask you if you want to create a virtual display.

Enable verbose logging:

/etc/NX/nxserver --debug --enable node
/etc/NX/nxserver --debug --enable server

Disable log cleanup in /usr/NX/etc/node.cfg:

SessionLogClean 0

Then connect to the remote server and reproduce the problem.
What is the command set in node.cfg (search for DefaultDesktopCommand)? Search log file /usr/NX/var/log/nxserver.log for that command.

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