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Linux Driver support for 8k

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  • ? Guest

    Are there any issues with driver support for 8k that will affect purchase choice?

    I recently bought an 8k TV (which is not brutally expensive when refurbished) and want to connect my workstation to it. I went through the list of video cards from my local store and the cheapest that claims 8k support is the Gigabyte RX 6400.

    Is a Gigabyte RX 6400 Eagle 4G a good video card for mostly text output at 8k resolution? I might do things like play Netflix in 1/4 of the screen and have text in the other 3/4. Definitely nothing at all challenging in terms of video. AMD drivers have a history of being reliable, but will I face some issues like lack of HDMI support for 8k?

    I've watched a YouTube video about trying this on Windows and they got frame rates as low as 4 FPS for games which is not a concern for me. It definitely works OK with Windows driving the card. Will I be likely to have issues running the same hardware on Linux?

    J This user is from outside of this forum
    J This user is from outside of this forum
    [email protected]
    wrote on last edited by
    #5

    Seems the card supports it, so shouldn't be a problem. I'd be more concerned about which refresh modes the TV handles that are also compatible with the card at 8k.

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    • jrgd@lemm.eeJ [email protected]

      You will need either an Intel discrete GPU or NVidia GPU if you want to use HDMI 2.1 to render at 8k@60. The Intel discrete GPUs have physical hardware that convert to HDMI and Nvidia uses proprietary drivers. If you can use displayport, any GPU (AMD, Intel, Nvidia) supporting displayport 1.4 or higher is suitable for 8k@60.

      U This user is from outside of this forum
      U This user is from outside of this forum
      [email protected]
      wrote on last edited by
      #6

      This is the correct answer. Using my 6900XT, I can't run a 4k120hz display over HDMI without DSC.

      This hopefully will change with the new AMD GPUs, but that's wishful thinking.

      D 1 Reply Last reply
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      • U [email protected]

        This is the correct answer. Using my 6900XT, I can't run a 4k120hz display over HDMI without DSC.

        This hopefully will change with the new AMD GPUs, but that's wishful thinking.

        D This user is from outside of this forum
        D This user is from outside of this forum
        [email protected]
        wrote on last edited by
        #7

        As a 6700XT owner, I use 4k@60Hz (my screens can't do better anyway). Does that mean I would need to use DisplayPort for better output in the future?

        U 1 Reply Last reply
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        • D [email protected]

          As a 6700XT owner, I use 4k@60Hz (my screens can't do better anyway). Does that mean I would need to use DisplayPort for better output in the future?

          U This user is from outside of this forum
          U This user is from outside of this forum
          [email protected]
          wrote on last edited by
          #8

          You can go higher that 4k@60 but youll be using chroma subsampling. Which can make text look really bad.

          https://www.rtings.com/tv/learn/chroma-subsampling

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          • jrgd@lemm.eeJ [email protected]

            You will need either an Intel discrete GPU or NVidia GPU if you want to use HDMI 2.1 to render at 8k@60. The Intel discrete GPUs have physical hardware that convert to HDMI and Nvidia uses proprietary drivers. If you can use displayport, any GPU (AMD, Intel, Nvidia) supporting displayport 1.4 or higher is suitable for 8k@60.

            D This user is from outside of this forum
            D This user is from outside of this forum
            [email protected]
            wrote on last edited by
            #9

            Based on your comment, I understand that AMD GPUs aren't capable of 8k@60 over HDMI. Is that the case? If so, why?

            tabular@lemmy.worldT windowsphoneguy@feddit.orgW 2 Replies Last reply
            0
            • D [email protected]

              Based on your comment, I understand that AMD GPUs aren't capable of 8k@60 over HDMI. Is that the case? If so, why?

              tabular@lemmy.worldT This user is from outside of this forum
              tabular@lemmy.worldT This user is from outside of this forum
              [email protected]
              wrote on last edited by
              #10

              AMD made an open source driver for HDMI 2.1 but HDMI forum won't approve. They locked down the specification for 2.1 and say the driver would reveal it.

              https://www.howtogeek.com/hdmi-forum-open-source-drivers-hdmi-2-1/

              I don't know if an earlier version can do 8k@60HD.

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              • D [email protected]

                Based on your comment, I understand that AMD GPUs aren't capable of 8k@60 over HDMI. Is that the case? If so, why?

                windowsphoneguy@feddit.orgW This user is from outside of this forum
                windowsphoneguy@feddit.orgW This user is from outside of this forum
                [email protected]
                wrote on last edited by
                #11

                Only on Linux, because the HDMI forum didn't allow AMD to write an open source driver with HDMI 2.1 features

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                • S [email protected]

                  It's a bad combo in my opinion. The HDMI forum hates Linux so we mostly use display port. If you need HDMI 2.1 or higher for 8k I don't know if it will work. It might end up with a really low frame rate. It is a crazy low end graphics card for 8k. That's a low end 1080p card as far as games go. DRM is a problem with crappy companies like Netflix, so you will probably be watching upscaled standard def pictures. They must want us to pirate.

                  ? Offline
                  ? Offline
                  Guest
                  wrote on last edited by
                  #12

                  The TV has built in NetFlix and YouTube so I don't have much need for playing video from Linux. Currently YouTube is the only source of 8K video that I'm aware of.

                  I know it's low end, I just don't want to spend much money. It seems likely that one way or another I'll find some problem with whatever card I get and want to replace it in a couple of years so I don't want to spend much.

                  The card is documented as having HDMI 2.1.

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                  • jrgd@lemm.eeJ [email protected]

                    You will need either an Intel discrete GPU or NVidia GPU if you want to use HDMI 2.1 to render at 8k@60. The Intel discrete GPUs have physical hardware that convert to HDMI and Nvidia uses proprietary drivers. If you can use displayport, any GPU (AMD, Intel, Nvidia) supporting displayport 1.4 or higher is suitable for 8k@60.

                    ? Offline
                    ? Offline
                    Guest
                    wrote on last edited by
                    #13

                    That card has DisplayPort 1.4 which means that if HDMI doesn't work then it's limited to HBR3 which gives 24bpp@31Hz, which is barely adequate.

                    Also how do you set the bpp rates? The DisplayPort wikipedia page says that 24bpp and 30bpp are supported, but how do I even know which is in use?

                    jrgd@lemm.eeJ 1 Reply Last reply
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                    • jrgd@lemm.eeJ [email protected]

                      You will need either an Intel discrete GPU or NVidia GPU if you want to use HDMI 2.1 to render at 8k@60. The Intel discrete GPUs have physical hardware that convert to HDMI and Nvidia uses proprietary drivers. If you can use displayport, any GPU (AMD, Intel, Nvidia) supporting displayport 1.4 or higher is suitable for 8k@60.

                      ? Offline
                      ? Offline
                      Guest
                      wrote on last edited by
                      #14

                      MAXSUN Intel Arc B580 Milestone 12G Graphics Card (MS-ARC-B580-MILESTONE-12G

                      The above is the cheapest card from my local store that has DisplayPort 2.1 (the rest have 1.4). It's $469 compared to $199 for a RX 6400 or RX 6500. I can probably find somewhere cheaper to buy these things but I'm working on the assumption that the ratios of prices are going to be about the same.

                      From the Wikipedia page it looks like DSC is needed to do 8K@60Hz on DisplayPort 1.4. I think that is bad for text though.

                      F 1 Reply Last reply
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                      • ? Guest

                        That card has DisplayPort 1.4 which means that if HDMI doesn't work then it's limited to HBR3 which gives 24bpp@31Hz, which is barely adequate.

                        Also how do you set the bpp rates? The DisplayPort wikipedia page says that 24bpp and 30bpp are supported, but how do I even know which is in use?

                        jrgd@lemm.eeJ This user is from outside of this forum
                        jrgd@lemm.eeJ This user is from outside of this forum
                        [email protected]
                        wrote on last edited by
                        #15

                        Ah yes, did mess up looking at the specs table for nitrate modes. Correcting root comment for anyone else who views this thread.

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                        • ? Guest

                          MAXSUN Intel Arc B580 Milestone 12G Graphics Card (MS-ARC-B580-MILESTONE-12G

                          The above is the cheapest card from my local store that has DisplayPort 2.1 (the rest have 1.4). It's $469 compared to $199 for a RX 6400 or RX 6500. I can probably find somewhere cheaper to buy these things but I'm working on the assumption that the ratios of prices are going to be about the same.

                          From the Wikipedia page it looks like DSC is needed to do 8K@60Hz on DisplayPort 1.4. I think that is bad for text though.

                          F This user is from outside of this forum
                          F This user is from outside of this forum
                          [email protected]
                          wrote on last edited by
                          #16

                          DSC is lossless compression.

                          ? 1 Reply Last reply
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                          • F [email protected]

                            DSC is lossless compression.

                            ? Offline
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                            Guest
                            wrote on last edited by
                            #17

                            DSC is designed to be visually lossless not mathematically lossless - you could say the same about JPEG. There are many reports about text being rendered badly with DSC.

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