LG UBK90 stuttering playback with Dolby Vision - Blu-ray Forum

winman42 · 09-06-2022, 10:30 AM

Anyone have an issue with this unit and playback of dolby vision 4k discs? The video stutters during playback every 30-45 seconds or so, and with this unit you can NOT make it switch to HDR10. It defaults to Dolby Vision. HDR10 only discs playback just fine.

The latest disc is DOG SOLDIERS from Second Sight. I'm using it with a Vizio V705J03 television.

Thanks,

Win

SMOOT · 09-06-2022, 07:43 PM

Quote:

Originally Posted by winman42

Anyone have an issue with this unit and playback of dolby vision 4k discs? The video stutters during playback every 30-45 seconds or so, and with this unit you can NOT make it switch to HDR10. It defaults to Dolby Vision. HDR10 only discs playback just fine.

The latest disc is DOG SOLDIERS from Second Sight. I'm using it with a Vizio V705J03 television.

Thanks,

Win

My first suggestion would be to go into the Menu and change the Resolution from Auto and select 2160P
(because if set to Auto the player may have trouble locking in the cadence for the disc despite the fact that this should not be an issue).

I have found that this player will slightly flicker with 1080i/50HZ 25 fps Blu-ray discs when played here in the USA. Setting the Resolution to 1080i fixes the issue as the player no longer has to work to find the cadence for the disc.

You may also need to select 24Hz in Display Mode

Don't know if these suggestions will help at all, but when having an issue, try everything that might help.

winman42 · 09-07-2022, 03:29 AM

Thanks for those tips, I'll try them out tomorrow, and see if they have any bearing on this issue. Much appreciated.

DualEdge · 09-07-2022, 11:19 AM

Quote:

Originally Posted by winman42

Anyone have an issue with this unit and playback of dolby vision 4k discs? The video stutters during playback every 30-45 seconds or so, and with this unit you can NOT make it switch to HDR10. It defaults to Dolby Vision. HDR10 only discs playback just fine.

I have this player as well and the most prominent issue that I encounter with it is that it will completely freeze usually 3/4 of the way through whatever I'm watching. When it happens, I have to completely power it down, restart it, and then hope the disc has a resume feature. I haven't encountered the video frequently stuttering that you mention though. Only other issue I have with it is that it vibrates rather loudly to the point where I need to close the door on my home theater cabinet (which is fan-vented, so it's fine) to muffle the sound.

winman42 · 09-07-2022, 03:09 PM

Ok, something very odd is going on with this player. This morning I figured I would try the changes that SMOOT suggested. I moved the unit back to the living room, from my bedroom where I was testing it with my second tv. (before it occurred to me my bedroom set doesn't do Dolby Vision lol)

So I plug it in, turn it on, insert the Second Sight edition of Dog Soldiers in 4K.
1. It plays back perfectly, no stuttering effect.
2. GO into to the settings and check to see how it's set.
3. Resolution is already set to 2160p, and Display mode is already set to 24hz.
4. Start playing the disc again, and the stuttering is back. WTH???
5. Turn the unit off, playback again, and playback is PERFECT again. WTH?

Not sure what is happening, but I'll test some more discs today.

winman42 · 09-07-2022, 04:30 PM

Quote:

Originally Posted by DualEdge

I have this player as well and the most prominent issue that I encounter with it is that it will completely freeze usually 3/4 of the way through whatever I'm watching. When it happens, I have to completely power it down, restart it, and then hope the disc has a resume feature. I haven't encountered the video frequently stuttering that you mention though. Only other issue I have with it is that it vibrates rather loudly to the point where I need to close the door on my home theater cabinet (which is fan-vented, so it's fine) to muffle the sound.

Well, sorry to hear of your issues. Thankfully mine is quiet, and no issues with it ever freezing. The dolby vision stuttering is very odd indeed. thanks for the reply.

Auditor55 · 09-07-2022, 08:38 PM

Quote:

Originally Posted by winman42

Anyone have an issue with this unit and playback of dolby vision 4k discs? The video stutters during playback every 30-45 seconds or so, and with this unit you can NOT make it switch to HDR10. It defaults to Dolby Vision. HDR10 only discs playback just fine.

The latest disc is DOG SOLDIERS from Second Sight. I'm using it with a Vizio

Thanks,

Win

They're not good players.

tcripe · 09-07-2022, 11:53 PM

I have mine connected to my Vizio OLED and haven't had any issues with the player at all.

Hasslein Curve · 09-14-2022, 08:46 AM

Had mine for about 18 months and no issues. I do plan to upgrade but it’s been solid for me considering the price point.

atfree · 09-14-2022, 12:20 PM

Owned mine since 2019, no issues at all. I watch 5-10 BD/4k's each week. Connected to LG C9 via Nakamichi Soundbar. It's really been a great no-frills player for me.

DisplayCalNoob · 09-14-2022, 11:55 PM

I have a UP970, I had to make sure that the player was set 24 hz, and that the HDMI input Full UHD Color was off.

SMOOT · 09-15-2022, 12:24 AM

Mine does the odd thing of not wanting to stay turned OFF. It will turn back ON itself. Sometimes takes 2 or 3 tries to fully turn it OFF.

Torgon · 09-15-2022, 12:52 AM

Quote:

Originally Posted by atfree

Owned mine since 2019, no issues at all. I watch 5-10 BD/4k's each week. Connected to LG C9 via Nakamichi Soundbar. It's really been a great no-frills player for me.

Same. Only issue I have is it freezes on DVDs when rewinding. Other than that it has handled everything I have thrown at it.

kcgr · 09-17-2022, 05:56 PM

Quote:

Originally Posted by Torgon

Same. Only issue I have is it freezes on DVDs when rewinding. Other than that it has handled everything I have thrown at it.

I think I had that as well many moons ago. A reset fixed it

09-06-2022, 10:30 AM	#1
winman42 Junior Member Member since:Jul 2021	LG UBK90 stuttering playback with Dolby Vision Anyone have an issue with this unit and playback of dolby vision 4k discs? The video stutters during playback every 30-45 seconds or so, and with this unit you can NOT make it switch to HDR10. It defaults to Dolby Vision. HDR10 only discs playback just fine. The latest disc is DOG SOLDIERS from Second Sight. I'm using it with a Vizio V705J03 television. Thanks, Win

09-07-2022, 03:29 AM	#3
winman42 Junior Member Member since:Jul 2021	Thanks for those tips, I'll try them out tomorrow, and see if they have any bearing on this issue. Much appreciated.

09-07-2022, 03:09 PM	#5
winman42 Junior Member Member since:Jul 2021	Ok, something very odd is going on with this player. This morning I figured I would try the changes that SMOOT suggested. I moved the unit back to the living room, from my bedroom where I was testing it with my second tv. (before it occurred to me my bedroom set doesn't do Dolby Vision lol) So I plug it in, turn it on, insert the Second Sight edition of Dog Soldiers in 4K. 1. It plays back perfectly, no stuttering effect. 2. GO into to the settings and check to see how it's set. 3. Resolution is already set to 2160p, and Display mode is already set to 24hz. 4. Start playing the disc again, and the stuttering is back. WTH??? 5. Turn the unit off, playback again, and playback is PERFECT again. WTH? Not sure what is happening, but I'll test some more discs today.

09-07-2022, 11:53 PM	#8
tcripe Blu-ray Knight Member since:Jul 2018 Location:Seattle	I have mine connected to my Vizio OLED and haven't had any issues with the player at all.

09-14-2022, 08:46 AM	#9
Hasslein Curve Special Member Member since:Aug 2012 Location:Southwestern US 4K collection:172 Blu-ray collection:902 DVD collection:205	Had mine for about 18 months and no issues. I do plan to upgrade but it’s been solid for me considering the price point.

09-14-2022, 12:20 PM	#10
atfree Expert Member Top contributor Member since:Jan 2011 Location:South Carolina Home Theater Gallery:6 4K collection:60 Blu-ray collection:1120 DVD collection:125 MA collection:65 Digital collection:8 iTunes collection:86 Prime collection:1 Blu-ray reviews: 4	Owned mine since 2019, no issues at all. I watch 5-10 BD/4k's each week. Connected to LG C9 via Nakamichi Soundbar. It's really been a great no-frills player for me.

09-14-2022, 11:55 PM	#11
DisplayCalNoob Active Member Member since:Nov 2017	I have a UP970, I had to make sure that the player was set 24 hz, and that the HDMI input Full UHD Color was off.

09-15-2022, 12:24 AM	#12
SMOOT Power Member Member since:Oct 2007 Blu-ray reviews:14	Mine does the odd thing of not wanting to stay turned OFF. It will turn back ON itself. Sometimes takes 2 or 3 tries to fully turn it OFF.

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