Screen turns black with HDR content

Help and Support Vero V
1

Hi

My screen Lg Oled turns black from time to time when it plays HDR content, this blackouts happen randomly

Seems happening since last update, I had too the problem of the resizing screen but I fixed it

Any suggestion

Thanks

2

Have you tried a different HDMI cable, resetting the connections with the cable your using now, or trying a different input on your TV? If you had tried those without success I would suggest to provide some debug logs which may shine a light on the situation…

3

I’m sorry it’s been a long time but I was kind of busy
Everything works with same HDMI cable, and other inputs work just fine

Here it is my debug file
https://paste.osmc.tv/jabuyutixa

Any help I would apreciate it

thanks

4

Enabling debug logging may give some more clues.

If you connect directly to the TV, bypassing the Marantz AVR, does it work?
We can force HDR to some older AVRS which works for some, but might not work for yours.

Sam

5

Hi

I didn’t try to bypass AVR, but what do you mean by “force HDR”? and by “old” you mean my Marantz AVR from 2017? Before updating Vero V it worked like a charm with Vero IV

thanks

6

mine did the same once- a restart helped.

7

I’d run it to the TV directly first as a test.

Then if that works we can investigate further.

8

I m sorry to answer so late

My blackouts keep happening, I play movies from my nas and when I play hdr content I suffer those blackouts, but funny thing is not always, often happen in the beginning of a movie 2 or three times and then plays smoothly. I don t know what depends on. I tried to connect Vero V directly to TV but my Lg oled c2 it s not able to passthrough dts or dts x, so in some movies I can t hear a thing. I guess at this point, will you need a recent log?

Thanks for everything

9

I’d previously suggested to try a different HDMI cable. You responded that other devices work with that same cable. The reason for the suggestion was because when you switch to a 4K HDR output the amount of data running through the cable gets much larger than just 1080p SDR and the cable needs to be able to handle it. There is also frame rate such that you might have a situation where 4K@23.98hz works without an issue but 4K@50hz causes problems. Not only can you have cables that are labeled to handle this not be able to, but you can also have cables that could handle it at one point, but sustained just minor damage such as getting pinched or kinked and they degrade just enough to drop out of spec. Running through an AVR you have potential for issues with the cable going from the player to the AVR, from the AVR to the display, as well as the internal connection connecting the two inside the AVR. Some AVR’s require 4K input devices use the inputs physically closest to the output for that last reason.

10

I would add that the HDMI plugs and sockets vary in quality, and plugs can get loose enough in a socket to cause problems. If you have an AVR you have 4 points of failure rather than 2.

Contact cleaner can be your friend, here.

11

Thanks for the answers, hdmi cable is less than 6 moths old and audioquest green, they weren t cheap. Now I disabled force 422 colour subsampling and I tried 3 different hdr contents and no blackouts at all but same thing happen a time ago and all of the sudden blackouts came back. It s true I always kept the subsampling on, I don t know if it s got anything to do

Thanks and I will tell you if blackouts come back

12

Hello, I think blackouts are due to the option “adjust display refresh rate”. With “start/stop”, I had some blackouts with youtube HDR videos. I think i’ts better to disable it.
Here is the Kodi Wiki page about this option
The path to this option is :
Settings->Player->Videos->Adjust display refresh rate> Off

13

If you disable that option then all videos will play at the same resolution and frame rate as the GUI. This typically will lead to reduced picture quality for at least some videos, but can also, depending on GUI resolution, cause playback problems as well.

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