Comment # 3 on bug 1174450 from Nathaniel Graham

This turned out to be user error/configuration issue with the way I was running
my Wayland session: by setting GDK_BACKEND=wayland and QT_QPA_PLATFORM=wayland
to work around the openSUSE defaults that hve everything run in XWayland, which
makes them blurry and ugly with a hidpi setup.

Removing those environment variables fixes the problem, though of course now I
have to live with blurry upscaled xwayland apps. :(