HiDPI Scaling Issues

What problems are you having with HiDPI? Is it the lack of fractional scaling?

On my windows 10 systems, I set scaling to 150%. Is that not an option with other OSs?

Xfce handles it very nicely with fractional scaling. As does Kde. Haven't tried Gnome though, couple years ago it had issues.

You do not need fractional scaling, just set the correct dpi in settings and use a high dpi theme.

This smells like a fractional DPI scaling issue.

Try using monitors with different pixel densities and setting per monitor fractional scaling. It never works as good as it works on a Mac (not a Mac fan boy... I would rather move to Linux but here I am).

DPI scaling (especially per-monitor DPI) is much much better, it it actually handled better than native Linux

This may be referring to running under Linux with a high DPI monitor - a lot of programs which are naïve about this don't scale properly and are teeny-tiny.

Use Wayland. Fractional scaling works fine there. If you are using X11 and xrandr scaling, and see performance impact, maybe that's the reason why it is not supported in GUI.On the other hand, I'm have no perfect eyesight, but in Linux, 1080p at 14" is as usable as Windows 10 at 125%. Here, the design choices made by Gnome are hitting its strong points, it is perfect resolution for @1X scale.

I have the same problem - 14 inch WQHD screen. I use 1x UI scaling, 1.6x font scaling. I also made a custom css for GTK that resizes window decorations/buttons that make them more usable. The solution is not perfect though. I am having some problems with Qt apps.Fractional scaling on 3.28 will allow you to have different scaling for each display. Will also be more consistent across different apps (Gtk, Qt, electron, etc.).