DPI Scaling with multi monitor setup

[MikaelElkiaer]

I'm currently running Arch and i3, on an optimus laptop with 4k monitor, and I have an ultra wide monitor with significantly lower DPI.
Long story short, it is no fun setting this up on Arch (or any distro for that matter).

How would this setup fare with a 144 DPI laptop screen and a 72 DPI ultrawide? Can KDE still handle this despite using i3?

[avivace]

it is no fun

story of hidpi

Anyway - the default scaling feature of Plasma is not handled by KWin so you're safe in replacing it with i3, nothing changes.

I can't check right now because I'm not at my 1080/4K setup, but you should be able to set per-display scaling with xrandr.