User gets 'No available desktops' when trying to connect to a server running on a Linux distributions with ConsoleKit installed. User is prompted to create a virtual display, but cannot access the physical desktop of that machine. Porblem was firstly detected on PCLinuxOS but can occur on different platforms as well.

This happens because NoMachine server is not able to detect a running in X server and propose to create its own display service (that is an embedded X server) to let users connect seamlessly a physical desktop running in background on the remote machine.