If it's still not working for you try:
Setting the windows desktop to HDR, sometimes this can keep Input Signal Plus on when it usually switches off.
Try setting TV game mode to Auto.
Press CTRL+SHIFT+[WINDOWS KEY]+B , this is a windows video refresh.
Try changing the refresh rate to 60hz in the windows display settings rather than Nvidia driver settings.
Your main aim is to get the TV/GPU to see 4k 60hz with 4:2:0 colour with input signal plus turned on. If you get that then usually you can just switch to 8k in windows display settings.
My TV does show 8k 60hz on the GUI when in the correct mode. Once in it stays in working until I reset the drivers.
Get hold of Samsung Support. They don't seem to accept that it's a firmware issue and blame everything else from a faulty TV to faulty GPU.
Like I've said, the TV worked fine a few weeks ago. When I purchased the TV about 6 weeks ago all I had to do was plug the TV in , set it to 4:2:0 colour depth and 8k and it switched to 8k without issue. Since then the TV downloaded a new firmware and now it's broken.
Just to add, if anyone from Samsung actually bothers to read these forums, a video showing that none of the resolutions are working.
In the video I'm scrolling through a games default resolutions, resolutions which used to work a few weeks ago until the firmware update.
They are :
3840x2160 - works
3200x1800 - works
2560x1440 - no signal
1920x1080 - no signal
1600x900 - no signal
1366x768 - no signal
1280x720 - working
"Your main aim is to get the TV/GPU to see 4k 60hz with 4:2:0 colour with input signal plus turned on. If you get that then usually you can just switch to 8k in windows display settings. "
Very true, i managed for the first time to get the tv to 8k, on 4:2:0. I maybe stupidly tried 4:4:4 (because i thought this TV can handle that?), and now back to square one. When i try set to 60hz again through the same steps the screen flickers madly. I can get it to Input Signal Plus, but just cant get it to 60hz and 4:2:0 again.
I did tell you not to touch the colours once you've set it up.
Even Nvidia state that 8k 60hz 4:4:4 , 4:2:2 or RGB aren't supported.
When you've got it back to 8k again, set the Nvidia scaling to GPU rather than Display. This will stop the screen going blank when you try and run games which default to 1080p etc
Ok, heres my fix. use Custom Resolution Utility to 'reset all', then 'restart'. Set the resolution to 4k 60hz. Once there put on game mode (which enables Input Signal Plus). Once monitor is at 4k 60hz with input signal plus on, 8k Native res should appear. I clicked enable 8k resolution with 4:2:0 10bit. It didnt work 5 times, keep trying, and randomly it works.
Lets now see if i can reset and it keeps settings! Thanks
Reset fine. Also, bare in mind this is with a Certified Maxanor 3m 2.1HDMI cable. havent tried these settings with the other 2 cables i was messing with. But indeed, as Wickfut has said, it seems to be down to getting 4:2:0 in the Nvidea Control Panel.
I did it this way and can confirm it works without the DP-HDMI. I've tried it a few times to see if I can get it to see 1440p and 1080p in game mode but still can't.
So.. since it's the reset Nvidia driver settings which seem to allow the TV to go into game mode, is this an issue with the TV or the GPU/Windows drivers?
game mode input setting plus is not a problem for me, i can make the TV go into that and it will show the 8k res, but will not hold, it sets to 8k, goes blank and then comes back up at 4k again
8k remains available but will not take and hold
the game mode and input plus mode is a load of dumbed down BS, i don't see why they couldn't call it what it is, but i don't have an issue with that - it's the PC that won't hold