I see that on my display as well. Hoping it's general HDMI 2.1 wonkiness.
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G-Sync does not work at 4K/120 on the LG C9 OLED via HDMI 2.1 with my 3080
- Thread starter Rbk_3
- Start date
Got a remote so I can access engineer mode. Installed the update on my CX (from UK). I'm in heaven getting the chroma, gsync, 120hz treatment. Yet to see the stuttering some people are reporting at 90-120 fps. But will keep testing.
do you have to choose the "PC" res further down in the nvidia resolution section to set 120hz?
Also do you manually set the 10/12 bit and colour range in the nvidia panel?
Curious to see a screen of your settings!
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This happens on my 1070. I believe someone earlier in this thread explained why it was the TV's fault.
Yeah I noticed that. Very slight overscan, maybe just a few pixels. At least there's a fix even if not ideal. Must be a bug in the pixel shift algorithm, hopefully gets fixed at some point.
Yeah PC res, 120hz, colours are set to RGB Full range at 10bit.
Ok cool thank you! Do you set HDMI black level to full on your OLED too?
I get the blank screen randomly with gsync so looking forward to the fix.
Yeah my plan is to disable it when im playing a PC game and then turn it back on when im not. Having it disabled makes me a little concerned with all the burn in etc on HDR on my console games!
Black level on high on the TV currently. Gsync was unusable for me before this patch. Just non stop flickering at 120hz.
How do you know whether or not GSYNC is really working? I get into the CX hidden menu and it also doesn't show the PC or even Chromecast doing HDR, just says HDR 8bit even if I have it set to 10bit on PC.
I did enable VRR through the CX but when I turn on GSYNC in the clock demo it tears and stutters. Runs fine with VSYNC though.
I did enable VRR through the CX but when I turn on GSYNC in the clock demo it tears and stutters. Runs fine with VSYNC though.
I've read that the CAC-1372/3 is a good (2-3 meter) cable that has apparently been confirmed working with the Gsync patched LG CX/C9 and 3080/3090 @ 4K120 HDR with full support of 8, 10, 12 bit whatever settings you throw through it.
I ordered one, should be here Thursday. I'll report back as soon as my B9 gets the update.
I ordered one, should be here Thursday. I'll report back as soon as my B9 gets the update.
I picked up a Belkin 48gbps cable earlier today. Works fine but missing the 3080 to put it through its paces.
Stole this from AVS
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Just tested enabling GSYNC, leaving the "enable settings for the select display mode" setting unchecked, and then enabling VRR in windows (right click > display settings > graphics settings > vrr). It appears to work! Capping FPS at 117 as recommended for GSYNC and I see no tearing.
Great workaround until we have proper GSYNC-compatible support.
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Just tested enabling GSYNC, leaving the "enable settings for the select display mode" setting unchecked, and then enabling VRR in windows (right click > display settings > graphics settings > vrr). It appears to work! Capping FPS at 117 as recommended for GSYNC and I see no tearing.
Great workaround until we have proper GSYNC-compatible support.
This works for me! :D SS 4 feels smooth like gsync is workign now.
So i've finally received my 3080 and installed it with my CX 48.
When I enabled full 4K, 120hz, I see flickering on my screen every 5-7 seconds. What's up with that?
Also, what's some tips I can try to do with my 3080 and CX?
When I enabled full 4K, 120hz, I see flickering on my screen every 5-7 seconds. What's up with that?
Also, what's some tips I can try to do with my 3080 and CX?
flickering is usually caused by a bad HDMI cable or one not able to handle the bandwidth. I had this with some of my Xbox One X and PS4 Pro games. It would work for a little bit go black, go back.....and repeat. Unless its an issue with the settings that people here are using a work around for to fix.
Gonna test this tomorrow. VRR is on but not about that display mode.
Yes, this works for me with c9 and 3080. Just make sure you have the newest hotfix drivers. Vrr is glorious!
Unless I am misunderstanding you, are you saying that LGs 2020 tv, the CX, has worse color compression than LGs 2019 tv the C9?
It's been already answered, i will add that 4k 120Hz is also at full "quality" on the C9.
"for the C9 models 4k 120 Hz 4:4:4 is working fine"
4:4:4 means no compression of color bandwidth (no loss of information).
The CX compresses the color information in 4:2:2 fashion
see:
for illustration on what that means visually
and the related article "chroma subsampling"
Chroma subsampling - Wikipedia
en.wikipedia.org
Do you have the overscan like others are seeing too or are you disabling pixel shift to stop it? It's quite obvious when it's over scanning as you can see the windows bar is slightly to the side and text isn't sharp.
Still unsure if disabling the pixel shift is ok or not for non HDR content like standard pc games.
i never noticed an overscan problem, so i'm not going to look hard for it lol. i wouldn't disable pixel shift just for it either
Likely you don't have it as it's not really missable if you have a working pair of eyes :)
I will continue looking into it.
my entire screen is slightly cropped, kinda noticeable, i however dont have any blurry text
Looking at it - mine isn't even cropped - it's almost zoomed in. If you turn pixel shift off and on etc you can see the wallpaper etc almost zoom in.
The confusing bit is if you set it to 60hz and don't choose the PC resolution one further down the resolution options then it doesn't do the slight zoomed in thing and pixel shift is still on as it should be an ever so slight pixel shift - not quite zoomed in.
Will try my older cable actually too as this is a new 8k 48gb cable.
The confusing bit is if you set it to 60hz and don't choose the PC resolution one further down the resolution options then it doesn't do the slight zoomed in thing and pixel shift is still on as it should be an ever so slight pixel shift - not quite zoomed in.
Will try my older cable actually too as this is a new 8k 48gb cable.
So any ETA when the CX and C9 will get the final release ?
Good that the issues have been fixed.
Good that the issues have been fixed.
Here's a good Setup Guide for using an LG TV as PC Monitor: https://www.avsforum.com/threads/20...-thread-consoles-and-pc.3123168/post-60146294
Sounds like feature is working as intended. How do you imagine pixel shift can work if there is no overscan and nowhere for pixels to shift to.
Well my point is I have 3 other HDMI input devices into this TV and the same thing doesnt happen and this is with pixel shift enabled as a default - its only been since I got this 3080 (first world problems I know) and now I'm looking to do the 120hz mode. If i set it to 60hz NON PC res in the nvidia resolution this doesnt happen. The other devices are consoles obviously like the Xbox/PS4 etc but you don't get an overly zoomed in image. Pixel shifting is normally a very small strip of pixels from what I understand.
It doesnt look like pixel shift to me as its just too zoomed in. It looks like overscan but the just scan doesnt do anything.
I'll get an image of what im seeing just to see if anyone else is seeing it.
Here you go - try not to be sick as the iphone went crazy being close ish to the screen :)
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It was under certain circumstances. There has been firmware updates since (some still private though, need to be obtained from their customer service), all this is maybe fixed (i don't have an LG ;) i was just trying to help decrypt the reddit and forum that was referenced at the time, sorry i can't help much more.
There's another new FW-Update for the C9 in Europe at least: 5.00.03 (via In-Start Service Menu in Engineer Mode). Just installed it, seems to fix the Overscan with Pixelshift enabled. Will test more when my new HDMI Cables arrive later today.
Oh my word - you may be my saviour! Also - i take it this is the thing that needs the IR receiver to access? I'd be happy just to know a fix is coming tbh so I can hold out if i need an IR and such.
Yes you need some kind of IR Blaster to access the Dev Menu. I've used my Harmony Remote for that.
Disable G-Sync. If you aren't on the unreleased FW that fixes gsync you will get flickering on 120hz 4k. I certainly did.
Ok cool thanks. Interested to see if you can do what I put in that imgur link at 60/120 to see if the overscan is sorted. It's definitely overscan as I've just set up a device without "just scan" and it looks exactly the same.
Curiously I've tested if I do normal 4k 60 (non PC res further down) its fine. But if I then enable the Nvidia colour settings and set it to 10 bit it does the overscan. Set it to 8 bit and it goes back to normal.
I must admit - when I think about it I've been using the LG OLED for outputting PC games for like 1.5 years and I've never really messed with the Nvidia settings outside of just leaving the colour space etc windows defaults so it might have been there all along.
However if I do the above for 4k (pc res) 120hz it doesnt change anything - always just scanned.
Likely this is a bit of early adopter-itis so I will just leave it for now I think and wait for the firmware and such before worrying about it.
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Edit: Sorry, but I have to correct myself: when I enable Pixelshift it still does a tiny bit of Overscan but as far as I can see nowhere near as bad as in your Screenshots. The Screen gets about 2mm wider when I enable Pixelshift. It does that with UHD Resolution 4k/60 and PC Resolution 4k/120 the same way.
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Yeah, it has always done this. I normally switch pixel shift off as it only moves the screen about 2mm each way.
Really impressed how quickly LG are fixing these things.
Clearly someone on the firmware dev team is a big PC gamer lol
See the images I posted - its overscanning, doesnt seem to the usual ever so slight pixel shift - entire image is slightly stepped inward. Fixed in the new firmware it seems anyway!