I've just confirmed that when I set the scaling to 1, the problem goes away. When I set the scaling to my preferred setting, 1.1, the problem is rampant.
I'm very sorry for the error. I am running the latest Buster for
everything. The problem I'm experiencing sounds an awful lot like the
description of that bug, so I assumed the fix hadn't been implemented in
Debian. If it has, then it must be a different problem. (Or the fix
isn't complete, or something.)
- Bug#924956: qt3d-opensource-src: Fractional HiDPI scaling ... Xan Charbonnet
- Bug#924956: qt3d-opensource-src: Fractional HiDPI sca... Dmitry Shachnev