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C9 Update - 05.10.04 - Can no longer connect to Dolby

RobNBill
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RobNBill Rookie

RobNBill

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Since this update the Apple TV 4K can no longer connect to Dolby via HDMI.  Immediately prior to this update - it worked.

Now, if you attempot to connect and set it to Dolby - the screen flashes the Apple TV screen on and off - it can't stabilze.

This happened immdeiately after the update.  

Can I revert back to the prior software?  Or, can you send me a version that does not have this issue.

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HomeCinemaLord
HomeCinemaLord

Good News!   LG Support answered me today. There is an update (05.10.15). It cannot be download over-the-air (yet). But from their website:  link hidden, please login to view 1. Download

PaulAng
PaulAng

LG needs to fix the broken Dolby Vision when connecting via an AVR. Seems that Pioneer issued an update. Connection Denon/Marantz is broken. @LG test your updates before pushing them to aTV. We do not

Chris O
Chris O

Just wanted to jump on and say I have the exact same issue: Apple TV 4K (2021) + LG C9 + webOS version 05.10.04 + Dolby Vision  It ends up in random and regular black flashes and the Dolby v

Gary Sheehan Newbie

Gary Sheehan

Posted
Posted

I am experiencing the same thing. I was watching a show in Dolby Vision and stepped away for a bit. The tv restarted and the new software installed. Immediately after, I got the same unstable picture. I had to switch Apple TV to 4K HDR to finish watching the same show I had been watching in Dolby Vision a few minutes earlier. Very frustrating!

AppleTV 4K through a Sony STR DN 1080

Chris O Newbie

Chris O

Posted
Posted

Just wanted to jump on and say I have the exact same issue:

Apple TV 4K (2021) + LG C9 + webOS version 05.10.04 + Dolby Vision 

It ends up in random and regular black flashes and the Dolby vision logo appearing on the top right.

  • Like 1
Seb28 Newbie

Seb28

Posted
Posted

Hi, I have the exact same problem, also going through a Denon AVR.

The update broke something, always worked fine until then. I hope the issue gets to LG so they can fix it quickly but until now support blames my internet connexion (fiber lol) and refuses to acknowledge the problem...

RobNBill Rookie

RobNBill

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Posted

On the Denon, if you enable "Pass Through" of the ATV while in standby mode - you can select Dolby on the ATV and the C9 accepts.

Guessing LG made a change that affects HDMI communication with the Denon since it was working fine immediately prior to the update.

I have a ticket open with LG - they said their sofware enginners would get back in a couple of days.  If I get a resposne i'll post it here.

 

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HomeCinemaLord Newbie

HomeCinemaLord

Posted
Posted

Having the exact same issue since i did the update today. Enabling Dolby Vision causes massiv screen flickering. Absolut desaster.

tried different cables, inputs…

LG messed it up. Unfortunalty not the first time (since half a year 4k 120hz aint working with nvidia 3000 generation. They know it. they are „working on it“.) 

i hope there will be a fix soon.

 

setup:

LG C9. 
Denon Receiver.

AppleTV 4K (2021 Version)

RoomTenONine Newbie

RoomTenONine

Posted
Posted

I received the 5.10.04 update to my C9 today.  I am in the US.  The update immediately broke Dolby Vision where it flickers and the screen cuts out like it constantly connects and disconnects from the Dolby stream.  It is worse with 60fps content vs 24fps.  I have a 2019 nVidia Shield Pro and Panasonic UB820 running through a Sony STR DN1080 with 48gbps certified HDMI across the board.  I have had no issues with Dolby Vision until this update.  Please fix or at least let us roll back to the previous firmware.

Seb28 Newbie

Seb28

Posted
Posted
16 hours ago, RobNBill said:

On the Denon, if you enable "Pass Through" of the ATV while in standby mode - you can select Dolby on the ATV and the C9 accepts.

Guessing LG made a change that affects HDMI communication with the Denon since it was working fine immediately prior to the update.

I have a ticket open with LG - they said their sofware enginners would get back in a couple of days.  If I get a resposne i'll post it here.

 

Enabling pass through of the ATV, I still got a black screen after 3 minutes of watching a video. Seems random, could be every 30 secondes or every few minutes.

HomeCinemaLord Newbie

HomeCinemaLord

Posted
Posted

LG Support is a desaster…

I reported them about the issue. They answered my with a „no reply“ E-Mail Adress and said they need proof. But i could not reply, because the e-mail doesnt allow it *facepalm*

So i contacted them again and put a link to this discussion it.

I refuse to believe that nobody at LG has an Apple TV or nvidia Shield to test this issue….

Kris Hofmans Newbie

Kris Hofmans

Posted
Posted

I'm also running into this issue ... very frustrating for a television that's often used with receivers/apple tv's, that means they don't do a lot of testing before they push out firmware updates.

  • Like 1
PaulAng Newbie

PaulAng

Posted
Posted

LG needs to fix the broken Dolby Vision when connecting via an AVR. Seems that Pioneer issued an update. Connection Denon/Marantz is broken. @LG test your updates before pushing them to aTV. We do not need crapy updates. We can wait until the tests are done

  • Like 2
Dicesdad Newbie

Dicesdad

Posted
Posted

If you haven’t already contacted LG you should. The more that complain the faster they’ll fix it. The wheel that squeaks get the oil. My affected receiver is a Sony STRDH790 7.2 Channel AV Receiver. My LG TV looks like crap without Dolby Vision. I even complained to the President of LG, which you can through their website.

Gfeltner78 Newbie

Gfeltner78

Posted
Posted

Same issue, but an interesting wrinkle with mine.  LG C9, same update as everyone and Dolby Vision is broken between my Apple TV 4K and Denon AVR.

what is interesting is Dolby Vision runs just fine between my Sony UHD player running through the same Denon to the same TV.  

So it has to be something specific to the LG and the Apple TV 4K (I have the 2021 Apple TV 4K by the way).

  • Like 1
theFuppet Newbie

theFuppet

Posted
Posted
18 minutes ago, Gfeltner78 said:

Same issue, but an interesting wrinkle with mine.  LG C9, same update as everyone and Dolby Vision is broken between my Apple TV 4K and Denon AVR.

what is interesting is Dolby Vision runs just fine between my Sony UHD player running through the same Denon to the same TV.  

So it has to be something specific to the LG and the Apple TV 4K (I have the 2021 Apple TV 4K by the way).

Well shit.. like i said. Nvidia shield here.. so not specific. Works fine directly connected to my 77c9. But not working like it should while going through my Denon receiver.

RobNBill Rookie

RobNBill

Posted
  • Author
Posted
25 minutes ago, Gfeltner78 said:

Same issue, but an interesting wrinkle with mine.  LG C9, same update as everyone and Dolby Vision is broken between my Apple TV 4K and Denon AVR.

what is interesting is Dolby Vision runs just fine between my Sony UHD player running through the same Denon to the same TV.  

So it has to be something specific to the LG and the Apple TV 4K (I have the 2021 Apple TV 4K by the way).

Hi - Is your Sony output Dolby?

private Newbie

private

Posted
Posted

Opened a case today, 19-Jun-2021, with LG support. Some additional information:

- My setup:  internet <- cat5 -> Roku Ultra HDR 4K UHD  <- HDMI -> Denon AVR-S960H <- HDMI -> LG OLED

- I'd recommend using LG chat. Email results in typical "reset this, reset that". You'll need model and serial number of TV.  Email response from LG stated that chat is only open M-F. but someone did respond today (Saturday). Open cases!

- I had the LG rep add the link to this thread to the escalation ticket.

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