Quoting: Loftyi guess what im trying to understand here is, does changing the subpixel layout in software fix the chromatic abberation as shown in the videos i linked where it not only affects text but actually more obviously to my eye the in game graphics.

I don't know about games, but I think subpixel layout is important for text antialisaing. Since games do antialisaing on a lot of complex forms, I don't think you can have any specific rules related to subpixel layout for that. At least I've never heard of such a thing. Font rendering taking subpixel layout into account is a thing.

Also, the higher is the resolution, the less all this is an issue in general.

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I found a way to do it. Set this in registry:

HKEY_CURRENT_USER\Software\Wine\Drivers\Graphics="x11,wayland"

Then unset DISPLAY variable and try something like regedit.

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For example, that's subpixel layout on some Lenovo laptops with OLED panels:



And that's on LG 27GR95QE OLED display:



And that's probably not the only ones out there.

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Subpixel layout situation is very bad with OLEDs, already referenced it above. Basically, no proper support. If you are lucky and your display is not some unusual RWBG and the like, it would look better, but if not, your fonts will be fuzzy.

From what I've read, the problem is amplified by multiple variants existing and this info not being reported in EDIDs for those screens.

There is a whole chain of things that need to be improved for it to work (from kernel's drm to fontconfig and toolkits like Qt and GTK or stuff like cairo and skia). It's probably comparable to HDR implementation in its scope.

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Did anyone actually manage to test the new Wayland driver for anything simple?

I tried it, but it's not working:

debug=true DISPLAY='' WAYLAND_DISPLAY='wayland-0' wine regedit
...
009c:err:winediag:nodrv_CreateWindow Application tried to create a window, but no driver could be loaded.
009c:err:winediag:nodrv_CreateWindow L"The explorer process failed to start."
009c:err:systray:initialize_systray Could not create tray window
002c:err:winediag:nodrv_CreateWindow Application tried to create a window, but no driver could be loaded.
002c:err:winediag:nodrv_CreateWindow L"Make sure that your X server is running and that $DISPLAY is set correctly."

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Quoting: deathxxxThis ray-tracing is just useless. Heavy drop performance for what?
Are someone care about ray-tracing? If you play game, do you look at ray-tracing? Or look other things, like how to keep alive?

I'd agree about something like Cyberpunk 2077. Performance drop in it is just not worth it. But may be some lighter games can benefit more from it. Didn't something like Minecraft add ray tracing support? No idea how it works without Vulkan though.

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Quoting: mylkai do not have many RT games, but i tried it with lego builders journey on epic with heroic
still have to use "RADV_PERFTEST=rt", or i do not get the RT option

You must have old Mesa then. It shouldn't be necessary otherwise.

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Just a few more MRs and Wine Wayland can be tested with games.

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Quoting: dziadulewiczThe sooner we get rid of Nouveau the better. Or better if Nvidia would start providing open drivers. Why in the world must the damned drivers be closed in this day and age! Opening up would lessen Nvidias own work as an additional benefit. But no.

Why should we get rid of nouveau? Rather, Nvidia should support nouveau like AMD supports amdgpu.

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Here is also an interesting read which mentions WRGB and RWBG subpixel layouts (never heard of them before):

https://tftcentral.co.uk/reviews/lg-27gr95qe-oled

I wonder if FontConfig even supports that.

UPDATE: I can't find anything here: https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues

Given such subpixel layouts aren't even supported, benefits of OLED screens become pretty moot.

UPDATE 2:

Found something related:

* https://gitlab.freedesktop.org/fontconfig/fontconfig/-/issues/328
* https://bugs.kde.org/show_bug.cgi?id=472340

UPDATE 3:

What a rabbit hole:

https://gitlab.freedesktop.org/freetype/freetype/-/issues/1182

> In fact, GTK4 does not support any subpixel geometry, which is upsetting to some people.

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