Context English State
Wayland is enabled by default in the GNOME Desktop. You can choose to run GNOME in X11 by choosing the Gnome on xorg option in the session chooser on the login screen. Currently KDE still uses X11 and although there is a plasma-wayland session available, it is not considered stable or bugfree at this time.
Determining whether you are using Wayland
One way to determine if you're running in Wayland, is to check the value of the variable $WAYLAND_DISPLAY. To do this type:
$ echo $WAYLAND_DISPLAY
wayland-0
$ loginctl show-session <YOUR_SESSION_NUMBER> -p Type
To determine your session number, simply typing `loginctl` should provide your session details.
There is also a legacy X11 server provided with Wayland for compatibility purposes. To determine what applications are running in this mode, you can run the following command:
$ xlsclients
Additional Resources
To find out more about Wayland, please see the following website:
https://wayland.freedesktop.org/
If you need to determine if an issue you are experiencing is related to wayland, see the Fedora wiki at the link below:
https://fedoraproject.org/wiki/How_to_debug_Wayland_problems