Physical desktop is not detected on systems with KDE Plasma 5.17
The problem has been reproduced on Arch Linux and openSUSE Tumbleweed.
sudo /etc/NX/nxserver --status
NX> 161 Enabled service: nxserver.
NX> 162 WARNING: Cannot find X servers running on this machine.
NX> 162 WARNING: A new virtual display will be created on demand.
NX> 161 Enabled service: nxd.
Summary: Resolved in version 6.9.2, released on 2019-12-17.
SOLVED, Released in version 6.9.2
