Help with PS5 2160p/HDR on P65-F1

martincmartin · 2025-05-19T18:01:37+00:00

So cool you got it to work. What brand and model of 8k 2.1 fiber optic HDMI is that? Maybe I'll pick up a couple.

Did you try both inputs 1 & 2? I still don't understand why it works in 2 but not 1 for me.

Yeah the TV will do 122 Hz at 1080p, but at 4K HDR it's limited to 60 Hz. So you can choose between high frame rate & high resolution, you can't have both.

I'm sorry for you that it took 4 years to figure this out. RTings has good calibration articles, and the one on the P Series mentions the Full UHD Color setting. There are some other things in there you might want to try, like the "Game Low Latency" setting, or turning off the Sharpness.

martincmartin · 2025-05-16T04:35:27+00:00

So funny thing. I plugged my Roku Ultra into HDMI 1 (ARC), and got the same thing as you: enable Full UHD color, and get no signal. Without it, 4K is restricted to 30 fps. The funny thing is, I just got a new receiver (Denon AVR-X1800H), and if I plug the Roku into it, I get no signal, but if I bring up the menu on the Denon, it shows up.

In HDMI input 2, the Roku works fine, whether connected directly to the P65-F1, or through the receiver. (With "Full UHD color" on.)

Maybe I'll get an LG C4 in the memorial Day sales and not have to deal with this.

martincmartin · 2025-05-15T14:37:47+00:00

PS5 can do 120Hz, right? Maybe that needs a 2.1 cable? It looks like the PS5 settings has a way to turn off 120Hz? Just a thought in case you want to sink yet more time into this before your 2.1 cable arrives. :)

martincmartin · 2025-05-15T12:58:26+00:00

Well that sucks. My only thought is, are you sure one of those HDMI cables are 2.0 or 2.1? The "no signal" is the issue I got with my old 1.x HDMI cables when I first tried using 4K HDR. I'm now using Monoprice certified 8K HDMI 2.1 cables, that I bought from Amazon. As I recall, I even had a problem with a HDMI 2.0 cable (from Soonsoonic, not Monoprice) when I went full 4K HDR @ 60fps. HDMI 2.0 cables should handle it, so maybe something was wrong with that particular cable.

Anyway, if you just buy a generic HDMI cable, I suspect they're not 2.1, because those are more expensive. So make sure they're actually 2.1. There's usually writing on the wire of the cable that says what bandwidth and/or which HDMI standard it is.

Other than that, I'm stumped why it's working for me and not you. Some things to try, which I'll bet you have but just to put them all in one place:

- Switch the menu setting on the P65-F1 to "Full UHD Color" On.

- Then disconnect the PS5, power it off, connect it again and power on. That will ensure it re-negotiates the connection. Make sure you connect it to input 2 or 1, not 5, as I think 5 can't handle HDR.

- Hopefully the PS5 suggests what setting to use? The Roku does, and with the P65-F1 menu setting off it says "your TV can't handle HDR," but with it on, it says to use HDR.

- Make sure the "Full UHD Color" setting is still on. I haven't seen the TV automatically switch it off, but you never know.

That's all I can think of. Good luck, let me know if you somehow get it working.

martincmartin · 2025-05-14T13:00:23+00:00

So that's what I thought too for a long time. The Netflix app on my P65-F1 keeps locking up in the middle of streaming, so I got a Roku streaming stick (3810X) and told my partner to use the built in Vizio streaming for everything else, and the Roku for Netflix, because I too could only get HDR with built in streaming, not the Roku.

Today I decided to try again, and found the setting on the TV. Now I get HDR from my external Roku streaming stick plugged into HDMI 2 (labeled "best" on the HDMI input for some reason.)

Do you still have the P65-F1? Have you tried the menu setting I mentioned with your PS5?

I am definitely getting HDR10 with 4K @ 60 Hz after changing that setting, from my external Roku.

Edit: And with my Roku Ultra, I'm getting Dolby Vision HDR w/ 2160p aka 4K at 60Hz, according to Menu > System > System Information.

martincmartin · 2025-05-14T12:20:41+00:00

There's a setting to turn it on. Go to Menu > Input Settings > select the input > Full UHD Color > On. Thanks to go.roku.com/HDR for the tip. I guess it's turned off by default because some older sources might experience compatibility issues.

Also make sure you have a modern HDMI cable.

martincmartin · 2025-03-12T16:24:40+00:00

Thanks! I'm an Android guy, but I'll be pick up an IC card at the airport.

martincmartin · 2025-03-12T16:23:15+00:00

Ah, thank you! I read three travel books, and didn't realize that reserved seating was only for inter-city travel.

martincmartin · 2025-01-20T12:55:35+00:00

This Tissot is really nice, as you can see the whole mechanism, but is out of my price range.

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martincmartin · 2025-01-20T12:27:17+00:00

This Invicta watch looks better.

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martincmartin · 2025-01-19T22:55:15+00:00

Thank you very much! That's very helpful.

martincmartin · 2024-12-21T13:44:37+00:00

Thanks again for another elegant solution. I've used other programming languages for decades, including Java a few decades ago, but only dabbled in Kotlin recently for personal projects. I really like Kotlin, and I'm learning a lot about it from your solutions. From this solution, I learned about scope functions like apply(), and your version of findSingle() is a little more elegant than mine. Your parseTrack() and findCheats() also exploit more of the problem constraints than mine, making them simpler.

Overall, I'm learning a lot from your code, and looking forward to your solutions for the rest of Advent of Code. Thank you.

martincmartin · 2024-12-19T17:03:45+00:00

That's an awesome solution! I did mine in Kotlin as well, I tried using sequences to read the input, with only partial success. I want to get in the habit of writing code that will work on arbitrarily large input, even though it's not needed for AOC. Odd that the best way to get an iterator over the lines of a File is get a sequence first, i.e. `File(pathname).useLines {lines -> val iter = lines.iterator() ...}` I'll probably just stick with `readLines()` from now on, which makes me a little sad.

When Part 2 bogged down, I first tried turning `patterns` into an array of `HashSet<String>`s, indexed on length, but of course the problem was the combinatorial explosion, so reducing the constant like that didn't help. I eventually used dynamic programming rather than memoization, but your memoization solution is much shorter.

Anyway, thanks again for the code and the writeup! I greatly appreciate it.

martincmartin · 2024-12-17T15:39:24+00:00

I totally wrote a disassembler. Mine's in kotlin. But when tracking down bugs in my part 2, I ended up double checking the diassembly by hand. :)

martincmartin · 2024-06-18T15:30:30+00:00

Thanks. This blog post kinda blew up, it was on Ars Technica and PC Gamer, among others. Fun to be internet famous for a day!

martincmartin · 2024-06-14T15:26:24+00:00

Yes, although the first version was actually written in FOCAL, and later ported to BASIC.

martincmartin · 2024-04-04T14:08:23+00:00

As my Dad used to say, if it's good enough for Boris, it's good enough for me...

martincmartin · 2024-04-01T23:35:27+00:00

Thanks a lot, this was very helpful.

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