Pop_OS 19.10
Wanted to chime in and say Pop!_OS is the leader when it comes to HiDPI on Linux I believe.Especially if you have 4K monitors or a 3K/4K mix where the monitors need a different DPI set.PopOS uses a system to manage the scaling very well. https://support.system76.com/articles/hidpi-multi-monitor/The closest comparison I've seen elsewhere is fractional scaling in Gnome 3.32+: https://wiki.gnome.org/Initiatives/FracionalScalingIf you have a configuration / workflow for HiDPI on Linux, it'd be nice to see if there were other options / any other things out there.