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GNOME 42 Lands DMA-BUF Feedback Support For Better Multi-GPU, Proper Direct Scanout

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  • GNOME 42 Lands DMA-BUF Feedback Support For Better Multi-GPU, Proper Direct Scanout

    Phoronix: GNOME 42 Lands DMA-BUF Feedback Support For Better Multi-GPU, Proper Direct Scanout

    Mutter landed a prominent addition today for GNOME 42: the Wayland compositor now supports the recently introduced DMA-BUF feedback extension...

    https://www.phoronix.com/scan.php?pa...A-BUF-Feedback

  • #2
    Looking forward to Kwin adding direct scanout support.

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    • #3
      Is there a way to try and fix issues with Wayland saying unsupported hardware when changing resolutions? I have a right portrait display and its native 1600x2560 on a 8.3 display so I need to switch to 900x1440 to make things easier to see since the scaling doesn't work with wine/proton prompts and various apps. I can get it to switch to 900p but I have to go to 720p which shows as a square in the top right of the screen to then switch to 900p restoring the full display. It's a pretty annoying bug and I'd like to help get it fixed somehow.

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      • #4
        Originally posted by ruinairas View Post
        Is there a way to try and fix issues with Wayland saying unsupported hardware when changing resolutions? I have a right portrait display and its native 1600x2560 on a 8.3 display so I need to switch to 900x1440 to make things easier to see since the scaling doesn't work with wine/proton prompts and various apps. I can get it to switch to 900p but I have to go to 720p which shows as a square in the top right of the screen to then switch to 900p restoring the full display. It's a pretty annoying bug and I'd like to help get it fixed somehow.
        What DE/compositor? (e.g. Gnome/Mutter; KDE/Kwin)

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        • #5
          Originally posted by shmerl View Post
          Looking forward to Kwin adding direct scanout support.
          Already supports it, as it does dmabuf-feedback with 5.24 (which will make direct scanout work more often once again ).

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          • #6
            Originally posted by aufkrawall View Post
            Already supports it, as it does dmabuf-feedback with 5.24 (which will make direct scanout work more often once again ).
            From what I've read, not yet or not fully at least.

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            • #7
              Originally posted by shmerl View Post
              From what I've read, not yet or not fully at least.
              Well, source?

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              • #8
                Originally posted by aufkrawall View Post
                Well, source?
                https://www.reddit.com/r/linux_gamin...eb2x&context=3

                https://zamundaaa.github.io/wayland/...n-wayland.html

                From what I read there, it's not yet present in current plasma, but it's coming.
                shmerl
                Senior Member
                Last edited by shmerl; 05 January 2022, 05:15 PM.

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                • #9
                  And which part exactly? Xaver Hugl said "dmabuf feedback, also coming in 5.24. It should make direct scanout work with most applications in most situations".

                  That's just what I said.

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                  • #10
                    5.24 is a future version, so that's not out while you said "already supports it" which is wrong. And it's not clear if 5.24 will have all of that (like for non fullscreen case), just some which is still good.

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