nor Ubuntu Studio, the two releases based on XFCE,
come with Wayland. Not sure why you would be using it on an XFCE system
at all.... The way things currently stand not sure I'd use it on
anything but a KDE/Plasma install.
I downloaded the 18.04.1 LTS, installed it over my existing 16.04 LTS
installation. It never prompted me about choosing between Wayland or X.
When I added XFCE4 to it after 18.04.1 was successfully installed, XFCE
either wouldn't start or it would freeze up. It still doesn't get along
with the Gnome3 privacy screen, either.
I found this post:
https://linuxconfig.org/how-to-disable-wayland-and-enable-xorg-display-serv…
Where it states that the default Ubuntu 18.04 BB installation comes with
Wayland enabled, and you need to disable Wayland to use X instead.
I would have been more inclined to believe the official Ubuntu Blog post but if that
wasn't your experience how can I argue. I've only installed the Studio and the
Xubuntu versions of 18.04 which I'm pretty sure were Xorg...
And the official Ubuntu Wiki also says Xorg is the default, you have to select/enable
Wayland.
https://wiki.ubuntu.com/BionicBeaver/ReleaseNotes#Ubuntu_Desktop
BionicBeaver/ReleaseNotes - Ubuntu
Wiki<https://wiki.ubuntu.com/BionicBeaver/ReleaseNotes#Ubuntu_Desktop>
Introduction. These release notes for Ubuntu 18.04.1 LTS (Bionic Beaver) provide an
overview of the release and document the known issues with Ubuntu 18.04 LTS and its
flavors. For details of the changes applied since 18.04, please see the 18.04.1 change
summary.The release notes for 18.04 are available as well.. Support lifespan. The
'main' archive of Ubuntu 18.04 LTS will be supported for 5 ...
wiki.ubuntu.com