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

(Topic created on: 03-10-2020 06:40 PM)
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Rauttis
Explorer
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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

2,028 REPLIES 2,028
Suriya
Voyager
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i got it from samsung higher officials. Different countries Different rules right?

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CypherXCII
Navigator
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Is the version to be released in europe the slightly improved version for the game-mode? Or the exact one what you have installed? 

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Suriya
Voyager
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First EU will receive 1402.7 only

Maybe later the upcoming version 

HQboy
Navigator
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Exactly the same version you gave us? Or an updated version of 1402.7?

Where's the owner of this topic? He should change the name of the topic to "Fix the localdimming in game mode to maintain the same quality that is out of game mode". So we would not lose the visibility of this topic!

Keitoki
Navigator
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Yes it's a very good idea for more visibility !

jayh89
Helping Hand
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This is almost bribery/extortion. What the hell?  Do not give any one any money for a TV update that will come in good time. 

jayh89
Helping Hand
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It’s not ok to have to pay for an update. For any reason. I appreciate all your help but paying isn’t okay. 

point_decay
Apprentice
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solicitation for software updates, Ive heard it all now.

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QuantumP
Pathfinder
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Just ignore him, he has been reported....again.

Subcultul
Apprentice
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I'm wondering how many times I will have to report this dude before he's banned once and for all?!?!