XPRA_DEFAULT_VFB_RESOLUTION was added in #1132.
We could just support:
Also make it possible to honour the
xpra start-desktop --resize-display=1280x1024 --pixel-depth=30
This will also work for
Xvfb, which will now start with a 30-bit display.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2772