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

[Dr Rainer Woitok]

Colin,

On Wednesday, 2019-06-05 08:44:29 +0100, you wrote:

> ...
> sudo apt install ubuntu-gnome-desktop^
> note the ^ on the end, it is important.

After doing a quick

   man apt | grep -E '\^'

and a not quite as quick Google search for

   +"ubuntu-gnome-desktop^"

without finding any clue  I humbly give in:  what's the  purpuse of that
trailing "^"?

Sincerely,
  Rainer