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Original topic:

2020 QLED T models (Q80T, Q90T, Q800T, Q900T) HDR game mode brightness / local dimming bug

(Topic created on: 24-09-2020 02:06 PM)
Rauttis
Explorer
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TV

I bought a Q80T a couple of days ago and have noticed a really annoying issue when using the tv with the combination of HDR and game mode.

 

I'm fairly certain this is a software bug in the TV since I can reproduce this issue with 100% accuracy, and it happens on the dot at the same moment every time. It's basically on a timer.

 

Basically when the game is displaying a HDR signal and game mode is enabled, exactly after 6 minutes the brightness of the TV suddenly drops by around 20 (50 -> 30). The value of brightness setting doesn't actually change however. Messing with the brightness setting does not restore the brightness to it's original state, but changing the local dimming setting from standard to low and then back to standard does. Switching game mode off and then back on also fixes the issue, but then it happens again EXACTLY after 6 minutes (I've timed this with a stopwatch).

 

Has anyone else experienced this issue? Or can someone maybe test this on their TV to see if you can reproduce it?

 

Exact repro steps on how I can reproduce this 100% of the time on the PS4 Pro:

  1. Set brightness to max (50)
  2. Set local dimming to standard (bug happens on high as well)
  3. Enable game mode
  4. Turn off game motion plus
  5. Turn off intelligent mode and all the brightness related settings in eco settings, as these can influence the brightness level of the tv.
  6. Launch a game that runs in HDR
  7. Start your stopwatch
  8. Do whatever you want in the game or you can also go back to PS4 menus, find a bright scene where you can notice a brightness drop easily
  9. When the stopwatch hits 6 minutes, you should see the TVs brightness suddenly drop by a large amount. By eye the brightness drop seems about equal to dropping the brightness from 50 -> 30 by hand.
  10. Go to picture settings and set local dimming to low (brightness does not change)
  11. Set local dimming back to standard (brightness suddenly jumps to the original level. Brightness can be restored by switching input away and back as well, or by disabling and re-enabling game mode)
  12. And again after EXACTLY 6 minutes the bug again repeats and the brightness drops down again

Some other notes: The PS4 has a screensaver that basically dims the screen if it is idle for a while. This is not the cause of this, this happens even when the console is in active use and the brightness can be restored temporarily by changing the local dimming setting like described above. I have not managed to reproduce this issue with game mode off, so it seems to be related to game mode.

 

Software version: 1304

1,974 REPLIES 1,974
Malooka5432
First Poster
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TV

This is bull****, this bug shouldnt be happening on a Q90T, which goes for over 2 grand, might just have to return and get an LG if this isnt fixed soon.

0 Likes
Soccercrazy1
Pioneer
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TV

Can you all please support this topic as well so it can be fixed.

 

https://us.community.samsung.com/t5/Qled-and-Frame/Q90t-game-mode-local-dimming-is-broken/m-p/143910...

0 Likes
Muzzakus
Explorer
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TV

Hmmm, I have a 75” Q95T coming soon.  Not sure I should bother unboxing it??  This and lack of proper array dimming in game mode sound terrible.  I’m expecting an upgrade on my 75” Sony 900E, not annoying limitation degrading the picture quality. 

What to do?

0 Likes
RouDeR
Pathfinder
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TV

You can game in 1440p/4k  120hz Movie Mode, input lag is less than 4k60hz GameMode, 
I do this on my Q800T, you get superior picture quality and low input lag.

Corwin
Apprentice
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TV

Dimming bug in game mode can be solved.

Set game motion plus on and put IT on 0 and 0

There is no dimming anymore with local dimming in high. Bear in mind ms Will be a little bit slower of tv but you do not notice this. Best way for now. And Lets wait for next update. Then hopefully motion plus can be off again.

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Corwin
Apprentice
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TV

When the update Will come? We are almost on the end of september now. Somebody Spoke with Samsung?

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Corwin
Apprentice
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TV

Dimming in Netflix etc. This is only by build in app. When you run Netflix from Xbox one s for example problem is not there and you can enjoy all HDR on filmmaker mode. IT is fantastic.

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Jalati
First Poster
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TV

Using Apple TV+ app with HDR on movie mode and brightness abruptly drops. Restarting the content works but annoying. Q95t 75” latest firmware. 

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HQboy
Navigator
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TV

The moderators are ignoring us, they know the problem. The mine also has this problem and I've tried everything to solve it. I also called samsung numerous times, I already sent messages to the moderators they didn't even answer me. Sometimes I think it would be better to sue Samsung. This is a giant lack of respect for us. And activating GMP does not solve it.

 

We will send messages to famous youtubers, HDTVTest, RTings, Tha_VillaMan, Stop the FOMO, etc ... let's see if any of them decide to support us and make this bug famous and force samsung to fix it.

Keitoki
Navigator
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TV

no, because game plus on = full of inverseghosting

edit: PC mode do the same sh!t