[WesolyKubeczek]

KWin/Plasma have a switch in the settings where you can toggle vaseline on or off. If you run modern X11 applications that are HiDPI-aware, or you can crank the size of fonts and controls however you want, you may turn it off. If you have that Athena widget application that is tiny otherwise, you turn it on (alas, there is no possibility to have two sets of X display and putting apps on the one you need).

The only thing that for some stupid reason can't be solved is that I can't turn off blurry interpolation on the low DPI applications. Come on! The low DPI layer is in integer multiples, make it nearest-neighbor pixelated but crisp! How hard is that!?

(same goes for QEMU. Argggh!)

[Arch-TK]

Okay, so there's _two_ options now which handle this properly. One conventional desktop environment, and one tiling window manager.