Unable to login to GNOME Shell xorg session while Wayland session works properly

[Liam Proven]

On Tue, 4 Jun 2019 at 11:56, Farhad Mohammadi Majd via ubuntu-users
<ubuntu-users at lists.ubuntu.com> wrote:
>
> Hello and thanks in advance for help.
>
> system: Ubuntu 19.04, fully updated, GDM3 only with GNOME Shell,
> installed by netinstall image.
>
> GNOME Shell on xorg was working well for weeks, until I installed the
> GNOME flashback session (packages: gnome-session-flashback, gnome-
> flashback, gnome-flashback-common) or "Applications Menu" the GNOME
> Shell extension via GNOME Software from extensions.gnome.org
>
> ** I can login to the Wayland session without any problem. **

This may be a silly question.

Tried removing it again, then re-installing the ubuntu-desktop package
in case anything else got removed?

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