Bug#924956: qt3d-opensource-src: Fractional HiDPI scaling causes serious artifacts in some QT applications

[Xan Charbonnet <xan@charbonnet.com>]

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.)

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.