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> that sounds like a (graphics driver) bug.

It wouldn't surprise me, although this is a bog-standard-fare enterprise laptop, a 5 year-old full Intel affair. No dedicated GPU or anything fancy.

But, for a long time, I had weird issues with display output on Windows. It would refuse to output 4k@60Hz without doing a stupid plug-unplug-replug-just-at-the-right-time dance, even though it worked on Linux. It took a good 3 years for that to work reliably.

And, in the beginning, those 5k screens only worked at 4k for some reason. Again, no issue on Linux.

But when any of the above situations happened, the state was actually correctly reported, as in 4k@30 Hz, or the 5k screen running at 4k. That's not the case now, everything says what it should, but the image is not sharp.

That's the only situation where I use Windows with scaling, so don't have any easy way of figuring which component is broken. All I can say is that the hardware itself seems to work fine.



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