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So you have 4k@60Hz and sound through the receiver?

I'm only looking at your computer, not your Roku - different hardware, different problems

Excellent!

For your Roku through the AVR, you'll need something like this
EDIT: https://www.amazon.com/Zerone-Feead...edid emulator&qid=1564001405&s=gateway&sr=8-8

Well, I changed the product. My understanding is you hook it up in between the Roku and the AVR, set the daisy when to provide a 4K EDID and it will provide one instead of trying to negotiate resolution with the avr.

D~, I set out to get your computer to talk to your TV through the AVR at a resolution of 4K@60Hz on updated drivers, and that is what I've done. Your Roku is a closed hardware device and there's nothing much that I can do personally to make it behave properly.

I think at this point I should explain what we've done so far and why, and why this doesn't make your Roku suddenly work as well.

Your video card and TV can both manage a long list of different screenmodes - combinations of resolution and refresh rate. Rather than trying each in turn until a signal lock is achieved, a package of data is sent by the monitor or TV back to the video card listing its acceptable screenmodes. The video card then picks its favourite out of those and attempts to start a display accordingly. If all works well, you get a very fast, flicker-free new resolution.

The package of data is standardised as the Extended Display Identification Data file - EDID. Unfortunately, like all standards, almost all manufacturers deviate somewhat from this, introducing custom extensions and inconsistencies in structure. Also sometimes they mess up on the hardware side so that systems don't correctly send, or parse, the EDID. More recently, EDIDs also reveal information about audio devices, available codecs and so forth.

There are often problems when AVRs are put into the loop. The AVR must also be able to tolerate the screenmode, audio format, codec etc. and so needs to intervene. What should happen is that the AVR has software to unpack the display's EDID, select its preferred screenmode and pass that through, then inject the AVR's audio format information as an extension block, before repackaging it correctly and passing it to the video device.

Unfortunately, like all standards, some implementations are more standard than others. If your TV doesn't present itself properly, or has too many or conflicting extension blocks, or if the AVR doesn't correctly handle the EDID parsing, or... as I think is the case with the Denon, it doesn't even try, but just provides a half-hearted version of its own... the video source can't understand the EDID, so falls back to the older method of trying each mode in turn until it obtains a signal lock. Sometimes, the AVR does work correctly, but too slowly, so the video source gives up before receiving a full EDID.

What we did for your nVidia card:
nVidia made changes to modesetting with drivers in the 360-series, to allow limited kernel modesetting support. This also changed how the driver handled EDIDs. I don't know the specifics of the change, but the result is that it's more sensitive to malformed EDIDs than older generations.

How we did it:
Collect the EDID from your HiSense TV
Force the nvidia driver to use that, instead of to listen for one coming from the Denon. Your computer's video card is no longer even aware that there's an AVR connected to it.

Result: 4K@60Hz on 430-series drivers (with sound) through your AVR.

Why doesn't this work for the Roku:
We made no changes to the Roku
The Roku is a closed device - we can't modify its software
The Roku is still trying to obtain an EDID from the Denon
The Denon isn't providing a correct EDID

What can you do about the Roku:
You can contact Roku's tech support - they seem to be reasonably responsive, looking at their forums, and they might be able to give you a patch, or
You can add a hardware device to spoof the EDID

If you add a hardware device:
The hardware device ONLY provides an EDID. It does not decode the signal in any way. As such, the device does not need to support HDR etc.. It only needs to pass through an HDMI2.0b or better signal.

Yes.

Take a copy of /etc/X11/edid.bin and /etc/X11/xorg.conf. Better yet, upload /etc/X11/edid.bin onto here. That way if you ever do need to reinstall, I can give you instructions to get back to where you are today very quickly, as we've now identified the problem and don't need to go through the whole process again.

No, those won't touch the two files in question.

Truth be told, I have no idea. I don't know whether the first one will be better, or the second one, or some other one. I looked for the first two hits I could find, late at night before sleep. Those two suggestions are the cheapest pass-through 4K EDID emulators I could find. There are better ones, but when an EDID emulator starts getting towards $200 then you're almost getting into the budget for a new AVR.

You're mixing units. The 1.4V refers to cable voltage. 2.2 refers to the content protection version. I'll be honest, I'm not sure whether the EDID emulator wouldn't break HDCP anyway. It's a case of, it's not a massive amount of money to risk, with a huge potential payoff, so try it and see.

Timeshifting should be in the Roku settings, not the HiSense unit. If lipsync was off, that was a Roku problem.

My old laptop has a geriatric GT320M (laptop version of GT218). My current laptop is AMD. But feel free to post screenshots and I'll explain.

Other than backing them up, leave /etc/X11/xorg.conf and /etc/X11/edid.bin alone. Leave the cables alone. The computer doesn't need a shower or cuddles, and would be quite mortally upset if you let the magic blue smoke out. Don't call it names and don't put Windows on it, and you'll do just fine.

I'm still overseas until next week, home midweek, then we're all off on holiday together... with nary a computer in sight

Do this as your normal user, no need for root permissions. (DON'T sudo these if they go wrong to ensure you can't accidentally delete anything):

cd ~
mkdir vidbackup
cd vidbackup
cp /etc/X11/xorg.conf ~/vidbackup/
cp /etc/X11/edid.bin ~/vidbackup/
cd ~
tar czf vidbackup.tar.gz vidbackup

Once done, you can upload the file to a message on here, or save it to a USB stick, or do whatever you normally do to keep your precious files safe.

FXAA = "Fast Approximate Anti-Aliasing"

Short explanation is it makes the picture slightly blurry to hide jagged edges. If the app's not designed for it, it looks like the screen's dirty - leave this on "Use application settings" unless you enjoy myopia.

Anisotropic filtering is the other one on that page. Also leave it alone - it sharpens up textures to try to bring out surface details like wood grain, and so can make things look pixellated and hard edged.

If you watch a video through your computer and experience screen tearing, turn on Force Pipeline. If you still have tearing, turn on Force Full Pipeline. Turn both back off before playing games though, unless you like that treacle experience.

Leave these alone - they're harmless.

I did consider giving them serial numbers, but the registrar didn't seem amused. Anyway, both are doing well - schools seem to like them, they have enough friends that we're not worried about them turning into axe murderers, and not so many that we're worried about them turning into politicians. Son the second has a phenomenally competitive streak, and I fully expect him to surpass #1 in just about everything, but of course I'm not planning to tell him that. #1 apparently has inherited my complacent streak, so having to find ways to keep him motivated. Apparently motivation by cattle prod is unethical thesedays, though...

More seriously, just looking forward to seeing them all for real, rather than on a phone screen.

As to names... that's one for a PM sometime - they can choose when and how to put their names on the public internet, when they're old enough

Perfect! Those files check out OK, so all done where your computer's concerned.

Which version of Roku do you have, by the way?

Actually...

D~, sorry to be the bearer of bad news. I did some more reading into your Denon AVR-S500BT - the S500BT is NOT HDCP2.2-compliant. No matter what we do, your Roku will not display 4K via the Denon unit. Your TV is HDCP2.2-compliant, however.

HDCP2.2-compliance was only introduced with the Denon AVR-S510BT, which was the refresh version of the same box, released a year later.

What this means is, if you haven't already ordered your EDID emulator, don't. If you have... well, we'll chat over PM, as I should've checked this before.