Ubuntu seems to detect that my laptop has a high resolution screen and, by default, sets everything to a 200% zoom. I prefer to set this back to no zoom, but with larger font sizes. This was no problem for Ubuntu/Gnome itself, but GDM does not seem to inherit these settings. Moreover, figuring out how to configure GDM seems like an absolute nightmare.
How can I disable the zoom feature? Or should I just switch from GDM to a different login manager?
This is distinct from questions about Grub resolution. Grub uses my native resolution just fine. The UI is scaled up separately. This also has nothing to do with trying to enable fractional scaling.