[Samsung g9 5120x1440@240Hz - doesn’t work (nvidia rtx3090) over display port. its really annoying. why cant i use 240hz in linux. in windows it works!
I have the same issue using the Sabrent USB Type-C to HDMI 2.1 Adapter on an 2080 Super Max-Q laptop GPU. No 8k60 in linux, works fine in windows. 4k120 does work both in windows and linux. This is with a Samsung q800t TV. I also suspect missing HDMI 2.1 DSC support in the nvidia linux drivers. Hopefully this will soon be added so we can have 8k60 linux desktops.
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Updated to 495.29.05 and still no 8K60. Is anybody from Nvidia able to comment on DSC support in Linux?
Now on 495.44 and still no 60hz at 8K. Anybody from Nvidia can give at least some indication that DSC is being worked on?
over display port no 240hz on 5120x1440
Adding to the frustrated owners of 8K hardware that is falsely advertising support for a feature that is not enabled.
The AMD situation is slightly worse than Nvidia in that the portion of the driver constrained by NDA is fully open source. Nvidia’s closed driver would not appear to suffer from the limitation imposed by a self-destructive restriction of the HDMI .org.
Nvidia should be no more precluded from implementing this in linux as they are windows. Please enable support for the features for which we have paid and were enticed to purchase.
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I’m happy to find this post. I’ve got 8k30 working in linux over HDMI and know about the DSC limitations, but I was hoping this was just for HDMI. Looking at the standards, DP1.4 supports even less bandwidth than HDMI 2.1, which means that until Nvidia supports DSC in their drivers, we won’t get 8k60 on linux :-(
Just tested the 510.39.01 beta driver and there is still no DSC on the HDMI or DP outputs.
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Here on 510.54 there is still no 8K60 over HDMI 2.1. Sigh…
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I have a LG C1 monitor and having issues getting anything 4:4:4 RGB from my 6800XT due to the license issues with HDMI2.1. I’m left with the reality I might need to go back to NVIDIA which I’m ok with really (was 1080TI before 6800XT).
HOWEVER I just want to confirm that you guys get RGB 444 running on HDMI2.1 at 120hz 4k? You see monitors/linux have a nasty habit of defaulting back to CYB420 Chroma signal so I need confirmation that it works at 120hz 4k RGB444…
No sure what this issue with 8k60hz is; but if that is due to the cards defaulting back to CYB420 signal also then it may mean your 120hz 4k tests you claim work is actually 420 and not 444/RGB!!!
@overlord.jarrard1 I’m pretty sure it’s RGB 4:4:4.
Using the rtings test image: Chroma Subsampling: 4:4:4 vs 4:2:2 vs 4:2:0 - RTINGS.com
it seems to be displaying correctly.
full resolution image: https://i.dllu.net/chroma444.jpg
Yes however 4k60hz can be done with HDMI2.0!
I just wanted to know if 120hz was possible at 444 which would indicated HDMI2.1 is in-fact working.
Yes but clearly it is 4k 120 Hz, as you can see from the first of the two images posted, which says “3840x2160 / 120p”. Furthermore 120 Hz is obvious from the smoothness of mouse movements etc.
Ok well that’s good. Makes buying a 40 series card more certain for me since nothing can be done by AMD with HDMI2.1. (their not allowed)
Here on driver version 520.56.06 with my RTX 3090 on Linux kernel 6.0.1, it is still not working! With 7680 x 4320 resolution, still only 30 Hz is available.
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Nvidia, with 8k displays coming in 2023, PLEASE implement DSC on Linux… we cannot realistically use 8k at 30 hz, specially if these monitors will cost as much as they will cost.
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Welp, back to Windows, I guess.