topic Arc not working..? 65hx92 in Android TV

Arc not working..? 65hx92

hdvanman1 — Tue, 29 Sep 2020 09:24:20 GMT

Hi I have a problem with arc on hdmi 3 not working when on Netflix or digital TV to my Denon Avr-x3500h it will only work with optical only. 65xh92.

The TV is connected to the denon via hdmi. My previous TV which was a Sony 55xe9005 and had no problems at all.

Must say the picture is a serious upgrade from my previous Sony and the speed of the menu system.

Re: Arc not working..? 65hx92

royabrown2 — Tue, 29 Sep 2020 09:59:41 GMT

@hdvanman1

Oops. Back later.

Re: Arc not working..? 65hx92

hdvanman1 — Tue, 29 Sep 2020 10:21:04 GMT

Hi just to make clear the TV is connected via hdmi. Number 3 hdmi is ARC and is connected to denon Avr-x3500h output with ARC. This worked on previous Sony tv.

Re: Arc not working..? 65hx92

rooobb — Tue, 29 Sep 2020 12:09:48 GMT

are you using ARC or eARC?

Re: Arc not working..? 65hx92

hdvanman1 — Tue, 29 Sep 2020 16:20:47 GMT

Hi how do you tell both hdmi connections say they are arc.

Re: Arc not working..? 65hx92

rooobb — Tue, 29 Sep 2020 17:27:59 GMT

Both the XH90 and your AV receiver specs indicate that they support ARC and eARC (while your previous TV was only ARC). My guess is that they may negotiate eARC and maybe your HDMI cable is not an ultra hd one... In this case you may force your devices (at least the TV) to use only ARC or you may try a faster HDMI cable to fully use your set up

Re: Arc not working..? 65hx92

hdvanman1 — Tue, 29 Sep 2020 19:10:34 GMT

Thank you.

Will try another hdmi cable thats says it's compatible.

Will post when tested.

Re: Arc not working..? 65hx92

rooobb — Tue, 29 Sep 2020 19:22:07 GMT

@hdvanman1 just checked better and maybe I guessed wrong... eARC on XH92 seems to be enabled by the future firmware update along with all the other HDMI 2.1 features while it is already available on all the other 2020's models HDMI 2.0 based... So you'll need a faster cable later on, but as of now it should work exactly as the XE90...

Re: Arc not working..? 65hx92

merseyswine — Wed, 30 Sep 2020 07:27:23 GMT

If I understand it correctly, there are physical differences between an eARC HDMI cable and a regular HDMI cable. The eARC cables are advertised as supporting ethernet, which is a requirement for eARC. I am assuming that this would require extra conductors in the eARC cable, or at least specially shielded conductors or something.

Does that mean that the eARC HDMI port on the TV would be physically different from the ordinary ARC HDMI port? If so, it can't just be handled by a firmware upgrade, unless the physical features were already there in the TV as manufactured.

Re: Arc not working..? 65hx92

rooobb — Wed, 30 Sep 2020 07:33:37 GMT

the ethernet feature is there at hardware level also previously, so the channel is there and can be implemented also on those devices that are not fully HDMI 2.1.

Re: Arc not working..? 65hx92

hdvanman1 — Thu, 01 Oct 2020 10:51:00 GMT

Hi think I have found the problem I have a Amazon fire Cube when disconnected from the denon Avr-x3500h it all works well.

I have tried to connect the fire cube to the TV directly and it all stops working.

Apple 4k TV works well connected directly to TV Hdmi 2.

Have ordered a 2.1 Hdmi cable.

Thanks for all your ideas.

Re: Arc not working..? 65hx92

rooobb — Thu, 01 Oct 2020 10:58:36 GMT

If that is the problem, while you are doing it buy also a CECless HDMI cable for the fire cube

Re: Arc not working..? 65hx92

royabrown2 — Fri, 02 Oct 2020 07:02:28 GMT

@merseyswine

The HDMI spec was enhanced in 1.4 to include the option of Ethernet over HDMI. This requires an extra strand in the HDMI cable, but does not alter the number of pins, or their arrangement, in the HDMI plugs and sockets.

But I don’t think anyone ever took this up; so eARC, requiring an extra strand, was mooted to use this. Accordingly, for eARC to work, you need an HDMI cable with Ethernet.

A requirement which lots of High Speed HDMI cables fulfil; you don’t need Ultra cables for eARC, though you may need them for other features on the latest HDMI-using devices.

What is still a closed book to me though, is the negotiation of eARC/ARC; it is supposed to be the case that an eARC device will ask the device on the other end if it can do eARC, and drop to ARC if not. So neither device should require an eARC/ARC selection option.

And even two eARC devices, linked by an HDMI cable without Ethernet, should just detect this, and both drop to ARC.

But worryingly, we are seeing cases where eARC devices are failing to negotiate anything at all, resulting in no sound, when they should be just dropping to ARC.

Hopefully, this will shake out over time, and with updates, so the question that users ask starts to be ‘why only ARC, not eARC?’ rather than ‘why no ARC at all?’

Re: Arc not working..? 65hx92

merseyswine — Fri, 02 Oct 2020 07:35:36 GMT

thanks @royabrown2 for this clarification.

So, as I thought, there is a hardware difference between eARC and ARC. And it's not just the HDMI cable. Even though the HDMI connector is the same, the corresponding circuit board and chip in the TV has to be designed to use the ethernet conductor in the eARC/HDMI cable.

So, for a TV to be upgraded to eARC by a firmware upgrade, that would only work if the TV had been manufactured with the hardware already in there to accommodate eARC. I can see that this would be the case, as it is said that many TVs in a range are identical regarding hardware and it's only the different firmware that distinguishes them.