DEBIAN… WHAT IS THIS :(
So there's this thing where everyone pushes Thinkpads for Linux and Lenovo LOVES, FUCKING LOVES, putting 1080p screens in a laptop so you wind up running them at 1.5x hidpi. I had a Yoga like this in like, 2015. Linux distros still treat this like an exotic configuration.
Google sends me to Debian forums which send me to the arch wiki which say to run "gsettings set org.gnome.mutter experimental-features "['x11-randr-fractional-scaling']". Great.