[Regression Bug] Samsung 2020 QLED TVs - GameMode is breaking the refreshrate while using Samsung DEX

[RouDeR]

Steps to reproduce:
1. Have a Samsung 2020 TV (Mine is Q800T) 
2. Have a Samsung DEX supported device like Galaxy S8,9,10,20  or Note 8,9,10

3. Connect the phone to the TV  > at this point everything will be OK (no issues with the picture)
4. Enable Game Mode > You will see a HUGE CONSTANT tearing and glitches at the bottom part of the screen, they are hugely desynced (bottom part of the screen have like 1 second delay of refreshing the image)

Additional Information:
Software version : 1115
TV: Q800T 75 inch (europe)
I also have Samsung KS7502 (2016 model I think) and I have no issues with Game Mode and Samsung Dex there !!!
Next week I`ll be getting Samsung The Frame 2020 and will report if this issue happens there as well.
Tested with 2 phones: Galaxy S8 and Galaxy Note 9

Video showcase:
https://www.youtube.com/watch?v=lnjt0SOxu2s&feature=youtu.be

[hastyclam]

I have a similar problem with PC hooked up over HDMI. Do we know anything about whether this will actually be fixed?

https://eu.community.samsung.com/t5/tv/q80t-quot-screen-tearing-quot-under-given-conditions/m-p/1939...

[smp79]

This should already be fixed in latest firmware.

[hastyclam]

Thanks for your reply! I still get this issue despite updating to 1304 on my Q80T. Can it have something to do about this thread being related to DEX and my thread being related to windows over HDMI?

[RouDeR]

This bug is still present in 1304.0 firmware for both my TVs
Q800T 75 inch and The Frame(2020) 55 inch