I have a desktop PC with a GTX 2070 Super connected to two displays - directly to a Dell monitor over displayport and then to a marantz processor over HDMI which then connects to a JVP projector, also over HDMI.
The monitor and the projector are in different rooms. My plan was to use the PC as a desktop PC for work connected to the Dell monitor, and then fire up the processor/PJ, turn off the Dell and use the other room as a dedicated cinema. This sort of works, except that when JRiver goes fullscreen, the processor loses signal.
If I leave the Dell on, everything is ok (other than having a second monitor that I can't see so I sometimes lose the mouse). If I turn the dell off and but switch sources on the marantz, I can recover the picture on the PJ.
Anyone got any idea about why this might be happening. The Nvidia control panel reports that a repeater is present when I have the processor on so I suspect it's some sort of HDCP issue. I can work around it, but I'd like it to work whether I leave the monitor on or not.
Further information:
I maintain audio throughout, even when the PJ is reporting no signal, the marantz sees and decodes the full HD sound.
I'm bitstreaming to the marantz so that I can keep atmos.
I'm using RO with MadVR turned up quite high. I get no drops with my settings on the Dell, or on the PJ when I have the video playing on it.
I will try fullscreen exclusive mode with the dell turned off. With the Dell turned on fullscreen exclusive mode is never engaged.
I need to confirm if it happens with all content. It definitely happens with 4k HDR.