Windows 10: Hdmi and DP not playing well together

I have an intel i7 in a fan-less box. It has an hdmi output and a dp. I want to use the dp for a monitor and send audio through the hdmi to my receiver.

In order to get the dp to work on my monitor I had to use another monitor through the hdmi. Then it defaults to “extended displays” and I can use the dp monitor. However when I remove the hdmi and plug in my receiver to the hdmi- the dp monitor thinks that a second monitor is connected. I can’t then open any windows on the dp monitor...

Hdmi and DP not playing well together

 

HDMI to Mini-DP or DP

Well I am trying to figure out how to run my PC and PS3 with the same Monitor. I was to retain my videocard sending out audio to my monitor as I use that for Skype, TS, and Vent. I have had that running through the HDMI. But now I have picked up NHL 12 and want to actually use my PS3 again, and unplugging my HDMI to run it to the PS3 causes issues scaling when I plug it back into the PC, not a terribly hard fix, but would rather get some use out of my monitors PIP and such.

I could just use HDMI to DVI for my PS3, but thats the fall back, just trying to figure out how to get the DP to work.

So far this is what I have tried.
PS3 -> HDMI -> HDMI to DP adapter -> DP Port (didn't work)
PC -> HDMI -> HDMI to DP adpater -> DP Port (didn't work)
PC -> Mini-DP -> Mini-DP to HDMI adpater -> HDMI (worked)
PC -> Mini-DP ->Mini-DP to DP adapter -> HDMI (didn't work)

Any tips on figuring out this Display port, like I said I got a fallback, I will be using my 5.1 for the PS3, but the PC I need to retain use of the 5.1 and the Monitor sound.

 

Why exactly is ATi considered be better at HDMI?

I plug my HDMI cable into the card, then into my TV. Those are the steps that I have to do. All the steps you list make absolutely no sense to me.

 

Lumia Display Dock and HDMI to VGA adapter

just to understand some constraints:

• HDMI is electrically compatible with DVI
• DP outputs from most PCs have an HDMI compatibility mode that allows for:
  • DP-to-HDMI passive adapters [passive means it just uses wiring (no ICs) between the connectors]
  • DP-to-DVI passive adapters
• In contrast, the USB Type-C output on the Lumia 950XL/950 phone and the DP output on the Display Dock do not have HDMI compatibility mode. To drive HDMI, DVI (or VGA), they require active adapters incorporating bridge ICs. The tipoff is usually that such
  an adapter costs $20-$40 instead of ~$10 for a passive adapter. There’s no good way to tell active versus passive other than by part # and spec.