topic Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working in TV

Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Kansilehti — Sun, 03 Jan 2021 09:12:37 GMT

G-sync stopped working with Samsung Q90R's HDMI4 port when I upgraded to a Nvidia RTX 3080 gpu (It has two HDMI 2.1 ports).

I previously had a RTX 2070S (it has a HDMI 2.0 port) and was using Q90R's HDMI4 port + G-sync and it worked perfectly with 1440p/120hz and 4k/60hz. Q90R firmware was 1372.2.

Now with RTX 3080 I can set Q90R TV's resolution to 4k/120hz 4:2:0 (input signal plus, game mode and freesync ultimate enabled). This was on firmware 1372.2.

However when I enable G-sync and run the Nvidia Pendelum demo (or games) the TV's screen turns black and it loses the signal. G-sync enabled I've tried the pendelum demo at 4k/120hz 4:2:0, 4k/60hz RGB, 1440p/120hz RGB. All of these end up in a black screen when running the pendelum demo using HDMI4 port.

If I connect the same HDMI cable from RTX 3080 to Q90R's HDMI2 port then G-sync works at 4k/60hz RGB and 1440p/120hz RGB.

So I can't get G-sync to work at all through HDMI4 port anymore. Any ideas what could be the culprit?

I updated Q90R's firmware to 1374 from Samsung website. This did not fix the issue.

I have tried with 2 different HDMI 2.1 cables and the result is the same:
Club 3d Ultra High Speed HDMI 4K120Hz, 8K60Hz Certified Cable 48Gbps 1.5 m/4.92 ft
Hama Ultra High Speed HDMI Cable, 8K, 3.0 m

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Ju7ez — Mon, 04 Jan 2021 11:36:53 GMT

Did you get this sorted out in the end? I recently got an rtx3070 and am having issues with input signal plus. When booting my pc connected to hdmi4 the bios start up shows but then windows is a blank screen. If I turn off input signal plus and then re-enable it is fine. I can run games/windows in 4K/120 using 4:2:0 but it’s just the initial boot up that keeps needing to be tweaked in TV settings to keep it working. I too have a q90r (75 inch) latest firmware.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Kansilehti — Mon, 04 Jan 2021 12:29:09 GMT

No I did not. I just posted this message yesterday.

Do you have G-sync working with HDMI4 port?

I actually can't see the BIOS screen at all from my PC with Q90R. It won't get video signal until Windows starts.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Ju7ez — Mon, 04 Jan 2021 12:37:35 GMT

I have not tried g sync yet. On the Samsung tv the only option is freesync which is for AMD cards but I believe the nvidia control panel will see this as a compatible g sync tv. Have you set your input source to game console? If it’s set to PC you will not have the option of enabling game mode or HDR etc. I am waiting for a new power supply as my new card requires a bit more juice and will let you know if I figure anything else out. Samsung has a guide for setting up the new RTX30 series cards and says that it should be compatible with the Q90R with Chroma Subsampling 4:2:0

https://www.samsung.com/us/support/answer/ANS00087803/

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Kansilehti — Mon, 04 Jan 2021 14:33:16 GMT

Yes of course I meant G-sync compatible. Please test it and report back if you get G-sync to work with HDMI4 port.

I did not know you could change the source type on the TV. It was on PC mode the whole time. However with PC mode on I have set Game mode ON and Freesync to ULTIMATE. i don't understand if they don't work for you? I have not tried HDR because I don't think it is necessary for games because many games have a badly implemented HDR mode.

I tried changing the TV's source type to Game Console but this did not fix my G-sync issue.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Ju7ez — Mon, 04 Jan 2021 14:43:56 GMT

Thanks for letting me know.

I prefer HDR on with my desktop as the colours are slighter dimmer which is preferred.

Does it work without freesync enabled?

I remember getting 4K/120 on desktop but have not tried g sync yet. Also I didn’t think it was possible to get game mode on with input set to PC - the option was greyed out for me. Looks like you have a newer firmware although when I check for updates it says there aren’t any. I am on 1372 currently.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Udlet — Thu, 07 Jan 2021 21:21:16 GMT

Hi,

I managed to get the g-sync to work when turning Game-Mode on when the input signal plus is turned off. The Game-Mode will force the input signal plus to work and it seemed to fix the issue.. very weird hardware behavior.

#using RTX 3070 with Q80T

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Ju7ez — Thu, 07 Jan 2021 22:21:33 GMT

Thanks for letting me know are you running at 120hz/4K? I was able to put get pc mode working with game mode - just prefer the brightness of using source as games console. I noticed that when you enable freesync it disabled input signal plus and forces it on automatically. So are you good now in terms of playing games and getting to windows?

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Udlet — Fri, 08 Jan 2021 16:53:23 GMT

Yes. I can confirm I can play with RTX 3070 at 4k120hz 4:2:0 using HDMI 2.0. No issues when moving to desktop.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Ju7ez — Fri, 08 Jan 2021 18:16:33 GMT

I can’t seem to get 120hz working, I have the latest firmware rtx3070 and a decent 2.1 hdmi cable. Tried all the options, freesync on/off input signal plus but just can’t go above 60hz in 4K. Samsung say it’s possible with hdmi port 4

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Ju7ez — Fri, 08 Jan 2021 18:25:38 GMT

Think I figured it out - had to turn HDR off to get 120 hz to show in windows. But then I turned HDR back on and 120hz still worked. Almost like I had to give it a kick - very strange. So now I have 4K/120hz HDR / Input Signal Plus and Freesync Ultimate on. Desktop takes a bit longer to show up on tv - 10 seconds or so after passing the bios screen. Like the tv needs time to update itself?

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Udlet — Thu, 11 Mar 2021 20:44:29 GMT

The solution I reported is can now be called as a false information.

The change which lead to the ordinary issue:
I powered of my computer and moved it to another location. I connected the HDMI 2.0 cable to the same port in TV (HDMI1) and same HDMI port in RTX 3070 GPU. The G-Sync is not working anymore.

How I managed to get it working previously:
I plugged the 3070 GPU with HDMI 2.1 cable to the Q80T HDMI 2.0 port 1.
I swapped the HDMI 2.1 cable to HDMI 2.0 cable and everything was working normally.

The question is: nVidia or Samsung? Who will be doing the fix?

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Ju7ez — Thu, 11 Mar 2021 21:03:02 GMT

Thanks for the reply - let’s keep this going!!!!

Currently I am working ok with 4K/120 with a few glitches here and there - mostly nvdlm driver problems (Nvidia issues) on port 4 with input signal plus enabled (Q90R).

Apparently Sony are providing a driver update for PS5 to fix similar issues with the console so looking likely that this is going to be an Nvidia fix required.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Udlet — Sat, 13 Mar 2021 10:50:11 GMT

I did also a test by connecting Q80T to RTX 3070 with HDMI 2.1 cable from Q80T HDMI PORT1,2,3 everything worked fine (4K120HZ+G-Sync) and if I swap the cable to HDMI 2.0 everything keeps working. The HDMI cable swap does something to the TV or to the RTX.

I have seen a video where a user has connected Q80T to RTX2070 with HDMI 2.0 and 4K/120HZ+G-Sync works. The issue must be with the RTX3000 series.. for some reason the GeForce HDMI2.1 port do no understand HDMI2.0 cable.. I think I have to change a forum.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Kansilehti — Mon, 28 Jun 2021 20:16:29 GMT

This issue is finally fixed with firmware 1381.2.

4k 120hz G-sync now works great.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Mescalamba — Wed, 30 Jun 2021 23:39:53 GMT

Unless they fixed it in some new patch, majority of Samsung TVs have non-working HDMI 2.1 port. Aka it works only in HDMI 2.0 mode at best (not even that mostly).

All Frames are broken as of last patch 1.5.0.6.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Udlet — Sun, 04 Jul 2021 12:41:30 GMT

I have discovered some new issues after the latest Q80T firmware and 3070 driver updates. All the other Q80T HDMI ports stopped working with the 3070 and only the HDMI 4 is now working. It never used to work before the latest firmware or graphic driver updates. The only issue is that when I enable G-Sync the sound going trought the HDMI cable gets interrupted for 1 second around every 2 minutes.

Anyway everything feels stable when using HDMI 2.0 cable from 3070 to HDMI port 4 in Q80T. The Nvidia Control Panel can see the TV is G-Sync compatible but the only issue occures with the sound.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Udlet — Sun, 04 Jul 2021 13:59:16 GMT

NEW TESTS - EVERYTHING BROKEN

HDMI1-2-3 ports do not work with Input Signal Plus which means I cannot get the high refresh rates. These ports worked well before the latest updates.

HDMI4 port only works when Game Mode is enabled but doesn't allow to have refresh rate up to 60 hz.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Mescalamba — Sun, 04 Jul 2021 16:12:13 GMT

Looks like Blizzard way of fixing stuff. We patch the game, fix one thing, break three others. Impressive how company like Samsung can be some incompetent.

Re: Q90R - G-sync does not work with HDMI4 port - 4k/120hz g-sync not working

Udlet — Sun, 04 Jul 2021 17:49:09 GMT

And now for some reason after trying everything HDMI Port 1 with HDMI 2.0 can display 4k120hz and show G-Sync compability.