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The technical merits of Wayland are mostly irrelevant
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this post was submitted on 01 Sep 2023
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I just passed scale to xrandr after computing the proper scale and then used the nvidia-settings gui to write current configuration to xorg.conf its not incredibly hard basically all you are doing is scaling lower DPI items up to the same resolution as your highest dpi item and letting it scale down the correct physical size. For instance if you have 27' monitors that are 4K and 1080p you just scale the 1080 ones by 2 if you have a 4k 27 and a 1080 24" its closer to 1.75. The correct ratio can be found with your favorite calculator app.
You can set this scaling directly in nvidia-settings come to think of it where you set viewport in and viewport out.
That's not at all the same thing. That requires downscaling some screens, which makes everything blurry and breaks subpixel AA.
Yeah, wherever someone says "X has/has had fractional scaling" I just ignore them because it's never actually true fractional scaling that doesn't look and act like utter crap.
It also tears significantly in my experience, which is pretty unusable....
I know you live in this weird universe where the screen that is 12 inches from my face actually looks like crap but it just isn't so you are merely confused.
It is literally how Wayland is scaling your shit you just don't know how anything works.
Huh? That is not how Wayland does it at all.
Without the recently added wp-fractional-scale-v1, yes, it will do that if you use fractional scales (albeit per window rather than per monitor). Not however if you stick to integer scales, as they might do in the 1080p+4k use case.