Hi there,
I've spent the last few hours trying to resolve this but no luck, here's what's going on.
I have a Dell P2815Q & p2715q each is connected to a MSI GTX 970 card (running Windows 8.1)
This works:
GTX 970: mDP -> p2815q
GTX 970: HDMI -> p2715q
This does not work (and I really want it to work this way):
GTX 970: mDP -> p2715q
GTX 970: HDMI -> p2815q
In this case the p2715q displays just fine, but the p2815q goes straight to 'enabling power save mode'. The p2815q doesn't show up in my resolution settings for the NVIDIA control panel or anywhere else. I've verified that the HDMI input works on the p2815q (using a laptop) and based on the working setup there is a signal coming from the HDMI output on the video card.
I've tried uninstalling & updating the NVIDIA drivers, updating the BIOS, and a bunch of other things.
I'm hoping I'm missing something simple, if not it looks like something is getting returned.
Thanks