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Joined 1 year ago
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Cake day: June 11th, 2023

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  • You don't need to use steamtinkerlaunch, putting gamescope --hdr-enabled --fullscreen -W width -H height -- %command% into the launch options is enough.

    Will the Gnome version of Bazzite work for HDR on an Nvidia GPU, or for that matter any other OS as long as I’m using gamescope to run the game with HDR enabled?

    Gamescope can't make a different compositor support HDR. Until Gnome supports HDR and the protocol used by gamescope, it won't work.








  • enabling the built in color profile desaturates colors quite a bit and does some kind of perceived brightness to luminosity mapping that desaturates bright / dark hdr content even more

    It maps the colors to be more correct, and it does use the brightness info from the EDID for HDR content, so that checks out.

    I think there must be something wrong with my screen since the hdr reduces saturation more than anything else

    It might enable some sort of gamut mapping on the display side... HDR on monitors is really weird sometimes.

    Side note, when I turn off hdr only from kscreendoctor the display stays in hdr mode until it turns off and on again, that didn't happen with nvidia

    I think that's a bug in amdgpu. It should force a modeset on hdr change, but it doesn't.


  • That has pretty much nothing to do with the color profile, when colors look very desaturated on HDR screens, that's the driver messing up the colorspace signaling.

    What GPU do you have? Both Intel and NVidia still have major problems with this.

    Many displays (but not all, which is why it's not exposed in the GUI) also support doing HDR without additional colorspace signaling, you could try enabling only hdr and disabling wcg with kscreen-doctor. IMO the color part is the more noticeable benefit of HDR, but you could at least have functional HDR until your GPU driver is fixed.


  • Fedora just has

    polkit.addRule(function(action, subject) {
        if ((action.id == "org.freedesktop.packagekit.package-install" ||
             action.id == "org.freedesktop.packagekit.package-remove") &&
            subject.active == true && subject.local == true &&
            subject.isInGroup("wheel")) {
                return polkit.Result.YES;
        }
    });
    

    in /usr/share/polkit-1/rules.d/org.freedesktop.packagekit.rules. If you put the same file in there, it should work.



  • Writing graphics code in a unified model is quite a bit different from the conventional x86 model.

    It isn't. The difference is pretty small, and it's just optimizations for when copies can be skipped and not a radical change in the approach of how rendering is done.

    Intel would need their own equivalent to Metal if they wanted to do a similar move.

    Not at all. If big-ish changes were required, they could be exposed as Vulkan extensions.

    I don’t know enough about Vulkan to say if it’s compatible with this kind of approach

    Of course Vulkan, the graphics API used on all modern phones except Apple's, supports using integrated graphics efficiently.