My ubuntu 17.10 is running with gnome-shell on Wayland. It was upgraded from ubuntu 16.04 which had already had gnome-shell installed and ubuntu unity removed.
The gnome-shell desktop now, however, seems slightly different from a newly installed 17.04 desktop, in that
1. ubuntu dock
The ubuntu-dock is not installed by default. I installed it from source and found there is no dock option in the system setting interface. The dock is placed at bottom and cannot be shifted or resized.
2. login chooser
There are two login options in the GDM interface, 'Gnome on Wayland' by default, and 'Gnome on Xorg' as alternative, whereas those for a newly installed 17.10 desktop should be 'Ubuntu on Wayland' and 'Ubuntu on Xorg‘.
3. xorg residual
I have removed all the xorg components in the system, but there is still a “Gnome on Xorg' option listed in the GDM login chooser.
What I want
I want to use ubuntu dock of smaller size placed at left instead of bottom, and to eliminate the Xorg option in the login screen (forgive me for this obsessive-compulsive desire).
What should I do?