Comment 25 for bug 1751252

Thanks @pjsingh5000. Your attachment shows the python stack ends at:

        # There's still work to do (postinstall). Let's keep the user
        # entertained.
        self.start_slideshow()
        Gtk.main()

Which agrees with what I see on screen when the bug occurs. It's the slideshow that never starts (or does, as a blank black/white image).

After that there is no debug info from comment #22. Although my attachment from comment #15 probably fills in the blanks: https://launchpadlibrarian.net/368099559/dbg.txt

So it looks like the bug here is entirely in the C code.