Screen flashes to black every 30-60 seconds on Dolby Vision on LG OLED

[starboy2008]

I have an LG OLED B3 and Apple TV 4K. I am using a brand new ultra-high-speed HDMI cable and have also tested other cables and HDMI ports. My Apple TV is set to 4K SDR with content and frame rate match on.

When I play some Dolby Vision, mainly on Infuse, the screen goes black every 30-60 seconds and the Dolby Vision logo appears in the right corner, and then the vision comes back. I’ve played different Dolby Vision content and it does not happen on all content (eg. Netflix), but more than 50% of what I play has the issues.

The only thing that fixes it is turning off ‘match frame rate’ on the Apple TV side or HDMI Deep Colour on the LG side. I would prefer to keep these options on. I also tried to turn off Trumotion completely, and it doesn’t fix it either.

I had a Sony 4K TV before this and did not have these issues.

Does anyone know how to fix this?

 

[StumpyBloke]

Try the new 18.5 release candidate developer update on your Apple TV. See if that fixes it. It was released last night.

 

[Sheepish-Lord]

I have an LG OLED B3 and Apple TV 4K. I am using a brand new ultra-high-speed HDMI cable and have also tested other cables and HDMI ports. My Apple TV is set to 4K SDR with content and frame rate match on.

When I play some Dolby Vision, mainly on Infuse, the screen goes black every 30-60 seconds and the Dolby Vision logo appears in the right corner, and then the vision comes back. I’ve played different Dolby Vision content and it does not happen on all content (eg. Netflix), but more than 50% of what I play has the issues.

The only thing that fixes it is turning off ‘match frame rate’ on the Apple TV side or HDMI Deep Colour on the LG side. I would prefer to keep these options on. I also tried to turn off Trumotion completely, and it doesn’t fix it either.

I had a Sony 4K TV before this and did not have these issues.

Does anyone know how to fix this?

That’s normal when matching dynamic range is on, at least for LG tvs so nothing you can do about it. Now it shouldn’t take 30-60 seconds more like 5 seconds.

 

[StumpyBloke]

That’s normal when matching dynamic range is on, at least for LG tvs so nothing you can do about it. Now it shouldn’t take 30-60 seconds more like 5 seconds.

I think you have misread what he said. He is saying that every 30 to 60 seconds the screen flashes. Not when switching content which then of course the screen will go black momentarily as it should when going from SDR to HDR/DV, and vice-versa.

 

[1 iron]

Had a similar issue with my LG tv and Apple TV 4k. Went though several HDMI cables before found one that worked. It was by iBirdie on Amazon. The 8k one solved the issue.

 

[Sheepish-Lord]

I think you have misread what he said. He is saying that every 30 to 60 seconds the screen flashes. Not when switching content which then of course the screen will go black momentarily as it should when going from SDR to HDR/DV, and vice-versa.

Ahhh, yeah I did. Sounds like the app sending the metadata is causing issues. Would try a different app capable of HDR, DV, etc.

 

[liam899]

I ran into this too. I fixed it by updating my TV’s firmware. You could also try a different HDMI port or cable. If it still blacks out, set your Apple TV to HDR10 instead of Dolby Vision or turn off Deep Colour on the TV.

 

[MacManiac76]

Sounds like a bad cable. Make sure you purchase an HDMI 2.1 Certified 48Gbps cable. The ones on Amazon usually work fine and you don't need to spend a lot of money on one either. I have had pretty good luck with the UGREEN brand.

 

[starboy2008]

Sounds like a bad cable. Make sure you purchase an HDMI 2.1 Certified 48Gbps cable. The ones on Amazon usually work fine and you don't need to spend a lot of money on one either. I have had pretty good luck with the UGREEN brand.

Definitely not the cable. I have a Ugreen one and another brand, both ultra-high-speed and officially certified.

These cables also worked fine on the Son,y which also supported Dolby Vision.