HDMI CEC/ARC Messed up

Hi everyone,As far as I can see, the HDMI CEC/ARC protocol is a complete mess, and every brand works on their one way with that. Nevertheless, let me describe my problem here:

My current setup:Apple TV A1842 ⇾ HTR-4071 ⇾ VSP01201 HDMI Splitter (Copy Mode) 1. output ⇾ TCL TV 65DP676X1

↳ VSP01201 HDMI Splitter (Copy Mode) 2. output ⇾ Ezcap269

Every time I turn on my setup, my Apple TV/TV have some issues trying to understand it other's signal and at the end shows a grayish image.Looks like Apple TV or the TV are not understanding each others HDR signal.

There are a couple of ways to solve it:

1. Disable HDR on Apple TV.
2. Restart Apple TV.
3. Open an app in Apple TV which changes the output signal (I have the Match Content option enabled)
4. Run “Check HDMI Connection” option on Apple TV.

All the options that solve it are annoying. I would like it to just work.

I was also trying the following setup settings:

1. Disable HDMI CEC on the TV. It sometimes worked, but I'm uncertain if this is 100%, and also I would rather not disable that since I want the setup to turn my TV on and off without having to do that via TV remote.
2. Disable HDMI CEC on HTR. Same as first option.
3. Disable “Match Content” option on Apple TV. Didn't work.
4. Remove HDMI Splitter. It works the best, but of course, this isn't the desired way. Furthermore, Ezcap269 has an integrated HDMI splitter that is even worse than the VSP01201.

Any further ideas how to solve it? Or even how to debug it, from which setting this issue is coming from? I also have an intel NUC with a HDMI-CEC Pulse Eight adapter connected to the HTR and can debug it, if I would know how to debug an HDR signal with it.

Submitted by marcosvrs

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