As requested, extra info:
Relevant hardware is HP 860 NA 077 with NVIDIA 970 and 16gb memory and (slave) msi GT72 2QE with NVIDIA 980m and 8gb memory.
Aircraft tested were: Aerobask Viperjet with GNS 530 and Carenado TM 850 with G1000.
Despite setting up a flight plan on both the master and slave computers,the slave GPS does not produce a course indication (red line) nor does the slave GPS follow the aircraft's track. Since I want to use the slave computer to display the instrument panel, I cannot follow a course using either the GNS 530 or the G1000.
Thank you for your interest so far. I hope you can help.