I have been trying to reproduce this bug in VMware but have not been
able to. Ubuntu 18.04 always starts up with a login screen successfully
for me.

What it does not do successfully is offer the "Ubuntu on Wayland" option
most of the time. So I expect that's the same root cause as this bug.

Ordinarily if Wayland support is attempted and fails gracefully then
your journalctl log should show something like:

  Jun 14 02:28:16 ubuntu gnome-shell[790]: Failed to create backend:
Could not find a primary drm kms device

If you don't see that message and still don't get Wayland support then
it suggests mutter/gnome-shell is crashing during that attempt to try
Wayland. In that case we would ask you to follow these instructions from
within the virtual machine:

https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment

I'll dig a bit deeper to try and find out why Wayland support seems to
work so rarely, because that's the part of this bug I can reproduce.

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https://bugs.launchpad.net/bugs/1832138

Title:
  Login screen never appears on vmwgfx but setting WaylandEnable=false
  fixes it

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