Originally Posted by desray2k
HDMI outputs to 2 different Displays - causing an issue
Discovered an issue with the way Anthem manage its HDMI outputs. I have one Projector (JVC DLA-N7) and a Samsung 4K monitor. Both display accepts UHD signal but ONLY the projector have HDR processing capability. One of the HDMI cable is an active Optic fibre cable (10m) connecting to my Samsung 4K monitor for casual viewing whenever I don't feel like watching it on a big-screen using my Projector. There is no problem sending 4K signal to BOTH displays but whenever I play a 4K UHD with HDR content, my Projector "refused" to play HDR (because the color gamut has automatically reverted to SDR 709 although the bit depth accepts 10/12-bit. For HDR content to be played, it require a BT2020 colorimetry profile.
Solution: I literally have to unplug the active fibre optic HDMI cable connecting to my Samsung 4K monitor for the Projector to work.
Comments: The 2 HDMI Outputs on my Anthem MRX-720 seems to take in a 4K signal based on the lowest display denominator - which in this case is my Samsung 4K UHD monitor which allows 4K signal to pass through (with HDCP 2.2) but not HDR capable and because of that, my JVC Projector will NOT allow HDR to be processed even when my monitor is turned off (presumably without any signal been pass through)! I thought this is kind of odd?!
My question now is whether to send Anthem a support ticket on this HDMI output issue or is there a workaround solution to my woes? I can't possibly be plugging/unplugging the my active fibre HDMI out whenever I want to watch 4K UHD with HDR content. That's not the solution.
Anyone have any experience with this HDMI output issue or is this a universally "known" AV industry fact that whenever you mix-and-match 2 "different" displays, the more "incapable" display will take precedence over the more capable display (in this case, my JVC projector)? Why when I shut down the monitor (powered off literally), my MRX-720 still have a "lock-in" to the EDID of my Samsung 4K monitor?!
I had exactly the same issue , sent email to support and no help.
The HDMI is claimed to be support the max 'common' resolution /spec the sink supported.
I.e. your case is 4k without HDR.
Regarding the sink is on or off, I suspect even TV is off, it still remember if present the EDID in standby mode, or your fiber HDMI has a chipset inside and remember the setting.
The only workaround for me was to unplug the HDMI. And I found it not acceptable either after weeks.
So I purchased HDFury Integral 2(splitter ) It handles any EDID issue nicely, always present a predefined signal to Anthem, highly configurable and stable.
I have never seens any handshake issue since I using it for more than half year .
The only downside is you need to pay extra money... (With some other features that no might not need)
In my experience, the Anthem HDMI can get confused by sink easily. So I always only has 1 HDMI connected to the splitter .
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