[significant edits] Originally posted as a question, have founds some good documentation for help.
The new 15v4 is a 4K screen with very high DPI (PPI); bright; and very non-reflective screen!! Awesome! Just one problem: 4K HiDPI requires some extra work to look nice in Qubes dom0 and the VMs. And even after configuration, it’s still a bit rough around the edges due to some remaining tiny icons, cut off fonts, and other oddities. THIS DOCUMENTATION on Github is a good summary of what to do.
Here are the dom0 values and settings I thought were in the neighborhood of useful:
- DPI at 288. A nice 3x integer of 96, which is recommended to avoid scaling problems with some programs
- Font size at 7pt
- Window Manager, Style, “Default-xhdpi”
- Settings Editor, Xsettings, GTK, IconSizes:
I even tried installing KDE to dom0, which seemed to cause issues, and looked like on its way to a system crash. Perhaps it was user error, I was changing a lot of settings. Finally, it looks like help is on the way, with XFCE 14.4 likely to be production released in a few weeks; hopefully quickly to be integrated into dom0. Supposedly it has been years since a major release, and they claim to have fixed the 4k and HiDPI integration problems.