Maybe this helps https://superuser.com/questions/779070/ ... virtualbox
Might have helped a bit. v0.18 stayed up long enough to make a new document, add a cube and sphere, then save. After that it just disappeared. I haven't be able to duplicate that little bit of success.
Interesting. Can you get past the black screen. I don't understand the QT5 plugin stuff. They are loaded at runtime, I think, so I don't know how to test.
Only got past the black screen the one time. I can see start page, Preferences or the QGraphicsView for sample Drawings, but as soon as I try the 3D view it either dies completely or gives the black screen.