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Ubuntu 20.10 / GNOME 3.38 Could See Better Intel Gen9 Graphics Performance

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  • Ubuntu 20.10 / GNOME 3.38 Could See Better Intel Gen9 Graphics Performance

    Phoronix: Ubuntu 20.10 / GNOME 3.38 Could See Better Intel Gen9 Graphics Performance

    While more laptops are shipping these days finally with Icelake "Gen 11" graphics and Tiger Lake with "Gen 12" graphics are expected soon, there still is an incredible amount of hardware out there making use of Intel Gen 9 graphics that have been in use since Skylake. It's looking like for the Ubuntu 20.10 cycle, there is going to be an emphasis on offering better performance for this very common generation of Intel UHD Graphics...

    Phoronix, Linux Hardware Reviews, Linux hardware benchmarks, Linux server benchmarks, Linux benchmarking, Desktop Linux, Linux performance, Open Source graphics, Linux How To, Ubuntu benchmarks, Ubuntu hardware, Phoronix Test Suite

  • #2
    UHD 620/630 graphics are simply a bit too slow for a smooth 4K experience, despite the name. Remember, Gen9 graphics go back to 2015 (Skylake) and are more or less unchanged since then, except for some clock speed improvements. Windows has a well-optimized compositor, but the 4K experience is rather sluggish with UHD 620/630 on this OS, too.

    Apple only uses high DPI displays. Do you think it is a surprise that Apple only uses Iris graphics? Nope. Iris iGPUs have roughly twice the number of shader units and they benefit from fast last level cache memory. You simply need that kind of power for smooth 4K desktop rendering.

    So, if GNOME gets some further performance improvements for systems with slow GPUs that's great, but it's unlikely these slow iGPUs will ever work well for 4K.
    Last edited by brent; 08 June 2020, 07:20 AM.

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    • #3
      Originally posted by brent View Post
      UHD 620/630 graphics are simply a bit too slow for a smooth 4K experience, despite the name. Remember, Gen9 graphics go back to 2015 (Skylake) and are more or less unchanged since then, except for some clock speed improvements. Windows has a well-optimized compositor, but the 4K experience is rather sluggish with UHD 620/630 on this OS, too.

      Apple only uses high DPI displays. Do you think it is a surprise that Apple only uses Iris graphics? Nope. Iris iGPUs have roughly twice the number of shader units and they benefit from fast last level cache memory. You simply need that kind of power for smooth 4K desktop rendering.
      I have a 630 ...more precisely P630 (but I havent found any differences). And on 4K Gnome running PopOs20.04, I have no issues at all. Everything is rather smoothly. Ok gameing sure not possible. but everything else is ok.

      edit: Youtube 4k@60fps feels more like 4k@30fps but not really lame. "normal" 4k clips (with 29fps?) are fine.
      Last edited by CochainComplex; 08 June 2020, 07:29 AM.

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      • #4
        Smooth means 60 fps with little or no drops, in all typical situations. That simply won't happen with these GPUs.

        Originally posted by CochainComplex View Post
        edit: Youtube 4k@60fps feels more like 4k@30fps but not really lame. "normal" 4k clips (with 29fps?) are fine.
        Yeah, that alone makes it a no-go.

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        • #5
          The strange thing would be if on windows there is no such problem doing 4K on 630

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          • #6
            Originally posted by sireangelus View Post
            The strange thing would be if on windows there is no such problem doing 4K on 630
            exactly it is not the chip IMHO.

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            • #7
              Spent a day with a 4K monitor and good/bad news: gnome-shell performance at 4K with Intel HD Graphics 630 is quite bad. So that will be another goal this cycle...
              Eh.. then stop using the Xorg session?

              The Wayland session works so much better, that's why it's default.

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              • #8
                Originally posted by brent View Post
                Smooth means 60 fps with little or no drops, in all typical situations. That simply won't happen with these GPUs.

                Yeah, that alone makes it a no-go.
                Ok 60fps in typical situations. 4k any desktopstuff works. 4k60fps is not so common. 4k@30 yes but there are no issues.
                I would say that this is typical. Gaming 4k@60 fps is also very untypical because it might not be even possible with a nvidia 2080 rtx.
                So everything is smooth but not in the Luxury case of 4k@60fps. I bet in VLC it is better.

                Im rather sensitive to such stuff. Yes the quadro T1000 is snappier on X11 but intel is smoother on wayland.

                But with my latest PopOS Nvidia setup and autotiling there is no wayland switchable anymore by default

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                • #9
                  Originally posted by Britoid View Post

                  Eh.. then stop using the Xorg session?

                  The Wayland session works so much better, that's why it's default.
                  Thanks

                  p.s.: it is a bit of an unfortune that the autotiling of PopOS is not so much working on Xorg
                  Last edited by CochainComplex; 08 June 2020, 08:06 AM.

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                  • #10
                    4k60 is still a mess on Linux.

                    With Xorg, you need to use cvt and a conf file with xrandr --addmode and --newmode in your xorg.conf.d folder to get anything else than 4k30. Then it works quite reliably.
                    Although I have issues with scaling at intermediate values (125-150-175). These values give random problems, such as an additional frozen cursor in the middle of the screen (on top of any window) or fullscreen videos breaking the signal with the TV. At 100% or 200%, everything's alright though (except it's too small or too big).

                    With Wayland, I believe 4k60 works out of the box, but for video playing 4k60 is just double the speed of 4k30, which means accelerated fps and high-pitched distorted voice. Any video player is impacted, and it is thus impossible to play a video normally on wayland in 4k60.
                    Last edited by Mez'; 08 June 2020, 08:32 AM.

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