LG OLED CX 48" 4K 120Hz G-sync Flickering Issue using HDMI 2.1 

Welcome

Yes.

With hdmi 2.1

Actually issue is with the gsync. It was an easy fix after I downloaded latest firmware. Nothing to worry about.

​@@MyGadgetsWorld thank you for quick reply mate! But on HDTVTest channel he said this is hardware issue and LG unable to fix it until the next models come up. You can search in YT this video: LG CX & C9 Unlikely to Get Fix for VRR Gamma Issue Caused by OLED Panel So I'm afraid to spend a lot of money on CX or BX tv to end up with such a problem :/

I know I watched his video too about it. I believe he is in UK and updates are different for different regions. I am using it here in States and VRR issue is fixed and I will make another video for the proof that it works flawless, it matches each frame with refresh rate which is what we need.

Elevated blacks will remain there since it is oled. There are calibrations that you can do to overcome any of the picture setting issues. I am gaming on Nvidia RTX 3080 with CX 48 inch model and I play competitive games like Warzone and trust me it has been amazing. I will give you one suggestion though, if you are going to use it for xbox and PS5 then go with QLED equivalent models. I have Samsung Q800T / Q850T and it will be good for gaming with VRR.

Hmm the problem is that Gsync works in the game mode. I hope you are in the game mode.

And that the option on your tv menu is called “INSTANT GAME RESPONSE” turn that on to enable gsync

@@kaospr8442 ok I’ll give that a shot, thanks

@@MyGadgetsWorld I found that in the nVidia control panel I can enable G-Sync

RTX doesn't have HDMI 2.1 , so it cannot do that with HDMI. It can certainly do with Display Port.

@@MyGadgetsWorld It can :D on HDMI 2.0b but is limited to 4:2:0. I did it on LG NANO 91.

Really. I thought you have to bring resolution to 1440p to do 120hz but not 4K 120hz because that requires hdmi 2.1

@@MyGadgetsWorld 4k@120 Hz 8 bit 4:2:0 uses ~18Gbps so it is in range of HDMI2.0b. It all depends of how much bandwidth is using.

My bad. Yes but you cannot do HDR. I got it now.

That’s not the case here, is firmware, software - I have the same set up but 55” CX instead. Have the newer firmware but still Have issues with gsync

@@kaospr8442 did some reading into it and it's actually the hardware in the tv itself. The vrr is whack. People gonna be cheesed considering its one of the best tv's on the market. Will do the same with xsx and ps5 also 😣

@@aaronrogalsky4167 I have read that - when I had my 2080ti I played 1440p at 120fps, 4K 120 at reduced chroma. Never had an issue with gsync. Now with the 3090 and playing hdmi 2.1 the gsync is fucked! It’s not smooth at all - lots of stuttering and just a mess, I prefer to play gsync off and just use ULLM and it’s stays plenty smooth - not as good as gsync used to be but still better than its current state - a pitty!

@@aaronrogalsky4167 I think its VRR issue that's in all g sync compatible devices. I have three monitors with flickering present. all freesync tech advertised g sync compatible.

No, I think it only happens at 4k@120Hz and VRR turned on.

Yes. That's true

@@MyGadgetsWorld what about the black crashed levels when using VRR? I am sure this is what may not be solved by firmware

oh right, ii have this issue (only noticable in game menus) with the lg gq900 48" oled. I should set it to 119 instead ot 120?

@@highjim7778 119 if you are using Freesync or Gsync compatibel or VRR. If not set it to 120 and activate V-Sync ingame or in the driver.

Btw. I am in the same boat. I have Samsung Q800T 8K TV and this OLED CX , let's see which one will be winner for console gaming.

I think that is because Samsung Q800T is not a compatible display. I also have same model but a club version from Costco q850T and gsync is listed as not compatible.

Yes

@@MyGadgetsWorld What cable do you use?

Hey! Did you ever fix the issue please? Thanks !

Need an update as well.

I just purchased the B2 65 series and a certified 120 hz 4k / 60hz 8k HDMI cable and I am having the slow flicker as well when attempting to set on my PC. I am also having the same slow flicker when attempting HDR on 60hz 4k. My TV mfgr date is 10-22 and I went thru a software update automatically when I connected to the internet so I can't imagine the firmware / software is outdated. I am running on windows 11 with and EVGA FTW 3080 10gb GPU / Ryzn 5600x CPU/ 32 gb 3200 cl 16 Corsair Pro mem / EVGA 850 gold PSU. Super frustrated. The main selling feature to upgrade from my 4k LCD was to increase the refresh from 60 to 120hz and of course the deep blacks and HDR dolby vision. So far I am less than impressed. Looks like hours of research and trouble shooting to see I can sort things out. First thing I tried was GSync and that just starting spazzing my panel to rapid flicker then it just dropped the signal and had to restart the panel and disable GSync. By the ware I have downloaded the latest NVidia drivers for my card as well. I am going to try a different certified cable as my first next step. Good luck with your display. Happy Holidays!

I fixed this btw, using an HDMI 2.1 cable, apparently older cables cannot do 4k@120hz and also they cannot do HDR.

2080 ti doesn’t use Hdmi 2.1

@@benjamin9886 yes I know, im using as much of the 2.o that i can use

thanks. I am sure you can use 2.0 hdmi upto 4k 120 hz but it will be at chroma subsampling of 4:2.0

@@MyGadgetsWorld That’s right, thanks

Especially when it's flickering

I would go with CX because it can do Gsync. Samsung panels are not compatible certified by Gsync.

MyGadgetsWorld apparantly it works anyway, id have to look again. Do you know if the flickering issue is solved in europe atm? Only reason id want anything else is because of burn in

And if flickering isnt fixed

If you have the latest update then yes it has been resolved. Actually i am using it right now and no issues with flickering

MyGadgetsWorld thanks for the reply. I ended up buying a qled q90t. Would like a cx but im certain my use would get burn in. Vrr might work, no biggy because i could still run a solid 120fps on games if i turned down a few settings

This has already been fixed with the update. I am having no issues on PC now. I am sure PS5 doesn't have Gsync so it won't be an issue.

Buy Zeskit 8k/ 4K 120hz Ultra High Definition HDMI Cable: amz.run/40nQ Buy Fiber optic HDMI 2.1 Cable: amz.run/42nS

@@MyGadgetsWorld Thx for your answer. Problems: Zeskit = No 10meter cable availlible and RUIPRO = Not ordered to Germany ( iam German)

@@bloodycorrey ah that's not good. Zeskit had 10 meter cable on Amazon though.

you have a solution of this bro?

@@franciscovn8177 Turn HDR off. That's basically it. Lol....I gave up and turned it off and haven't really had that problem since. It seems to me to be related to HDR and G-Sync like maybe HDR has some effect on G-Sync but it could have something to do with the HDMI port I'm connected too or possibly the HDMI cord itself as I am using a fairly long HDMI cord.

@@franciscovn8177 I will say this though, I'm connected to the HDMI port of an Nvidia 3090 and the cord I am using is probably about 12 ft long.

@@franciscovn8177 I asked CoPilot and it mentioned Cable Quality could play a role. It said a 12 foot cable might not be sufficiently shielded (Mine is running near some Metal and Old Ungrounded Outlets, so that might play a role). It also reminded me to make sure the cable was capable of handling the bandwidth since HDR requires more bandwidth and I'm running at 4k

@@franciscovn8177 If you have an LG C2 you can buy a Maintenance Remote and bypass the Auto-Dimming built into the LG C2. I tried this and it worked so my LG C2 is about 3x brighter then a normal LG C2 and I have had it like this for over a year with no signs of Burn-In. If you have an LG C3, I hate to say it but it's basically an LG C2 with the Auto-Dimming Locked so that you can't disable it. LG released the LG C2 and named it an LG C3 with one actual difference, the Service Remote no longer lets you disable the Auto-Dimming. They did this for the sake of charging more then what it was worth and making Bank.

Then you don't have an hdmi 2.1 cable, it doesn't matter what the box says.

It had the problem which is solved with the firmware update. Now it works with 4K 120hz and with the same cable :)

@@MyGadgetsWorld no flickering at all? I mean with GSync/VRR.

Yes not at all. After new update everything is good.

@@MyGadgetsWorld ultra thanks 😁

@@Delijohn george αν τη παρεις και το δοκιμασεις απαντησε και σε εμας

Yes latest firmware update has fixed it

@@MyGadgetsWorld ok cool. so gsync flicker and gamma issue are different? both are fixed?

I mean If you go very very and very technical then yes. Just keep the freesync off and use HDMI VRR which tends to work fine. I saw his video too and he mainly talked about Freesync on then dolby vision off and VRR increases gamma , which can be fixed with HGiG calibration and in game calibration.

I had an update today and my tv is no longer flickering

Do you have 48" OLED CX? If yes then it is happening only on 45" model in the US.

I have a 55” CX that I’d be happy to rest on but I can’t get my hands on a goddamned 30 series card.

Man I feel that. I even had to pay extra to get it. :(

@@MyGadgetsWorld I am resisting the scalpers for now but damn if it ain’t tough! Also I am really hoping these issues and the stuttering issues are fully resolved. I have another 75ish days on my return period to Costco, but, I like the TV otherwise. It’d just really suck to have such a major feature nonfunctional!

I am running new update that I downloaded from South Korean LG website and Gsync is working amazing. Actually I love this TV performance for gSync. It matches frame to frame with refresh rate which is amazing and serves the purpose of Gsync.

Yes. That's on the list

Not at all. PS5 doesn't use Gsync.

@@MyGadgetsWorld do I have the issue with vrr or freesync

It has been fixed when I downloaded the update from LG south korea website. So i believe it was just firmware and LG fixed it.

@@MyGadgetsWorld thank you

Welcome.

I also have the 48"

No. Because PS5 doesn't use nVidia Gsync.

@@MyGadgetsWorld but ps5 uses vrr and apparently that will have issues as well

Yes

Yup. Really disappointing. And US is the biggest consumer market for these products

I got the update last week.

Yeah i have g7 as well. Mine is fixed though. I ordered a new cable that can do 32gbps HBR3 certified. Now everything is good.

@@MyGadgetsWorld I ordered a HDMI 2.1 - I still have the problem. Do I need to look for anything else? Also the monitor is flickering when turning back on after I've been away. It takes 15 seconds or so until it is ready. Does your do the same? My secondary monitor is ready within 1 second...

Please were you able resolve the issue. I am having the same issue and need solution

@@austinbediako9866 If I remember correctly it was the CABLE !!

@@nac5000 Thanks I just looked at my HDMI cable box and it's 2.0 so I will buy 2.1 version

@@austinbediako9866excellent my friend have a wonderful life 😃

nvidia panel

2.1 hdmi cable

@R J well, without 2.1 it don’t work. At least with 2.1 it SHOULD work. But if it doesn’t its something else wrong. The cable can be bad quality. Too long cable makes it also worse. I have the exact same setup. One cx 65 and one b1 65. Also have had the cx 48. And rtx 3090. Got some problems with the b1. It some times get signal loss from the hdmi to rtx 3090. Never signal loss with PS4.

Yes.

Same here. I prefer a Gsync Capable monitor over a gsync compatible but TV have come far almost reasonable for PC gaming. Future is good for TV gaming

Check the cable

Using the same cable after update and working fine. It was. It was not the cable. I always check cables first. This is the same cable i used for 8K test on my Samsung 8K TV.

@@MyGadgetsWorld Do you have an affiliate link for that cable anywhere?

@@MyGadgetsWorld What Samsung 8k tv do you have, and is it g sync compatible? and are you also facing similar problems on your 8k TV with gsync over the HDMI 2.1 port?

Yes it has been fixed. I am using it now regularly

@@MyGadgetsWorld thanks for reply dude ! Currently have LG CX 55 using on PS4 pro Cannot wait for Series X

Same here.

@@MyGadgetsWorld hey man that is good news but do you think you can use it with the series x @ 120hrtz running 4k vrr mode on grtz stefan

I am playing Gears 5 with VRR 4K 120hz and it is working flawless.

It could be solved in the new 2021 models. They stated its a hardware problem (Panels only natively support 120Hz) in the 2019 and 2020 models that can't be fixed.

Technically supply is stopping you as well

LOL, is this the “only thing stopping” you?

PS5 won't have VRR out of the box so you don't need to worry. Sony once again misleading and shafting customers. The latest X900H firmware update has pretty much made plenty of the TV's useless, now the PS5 news? Not sure what's going on with them, but it's an embarrassing shame.