I remember at one point, maybe in Fedora 27, I was able to pick from a dropdown menu whether to login with an X session or a Wayland session. As mentioned in my related post, Wayland isn’t handling rotating a screen very well right now, so I’d like to use X temporarily. I can do this with a config file placed in /etc/X11/xorg.conf.d, but since deleting or moving a configuration file every time I want to switch is inefficient, I’d prefer to use the dropdown menu on login.
The menu doesn’t appear even when I have my user account selected. It doesn’t appear on a cold boot, it doesn’t appear if I reboot, and it doesn’t appear if I log out.
You should need install the plasma-wayland session to see this option in the menu but i dont know how stable it is in KDE… Sure you can find a bit more of info about it in google.