Created attachment 876623 [details]
xsession-errors file

When I try to use the Plasma/X11 desktop, after a reboot I reach the KDE login
screen OK. If I choose to log in with the Plasma/X11 desktop, after entering my
login name and password, the screen just goes blank for a moment, then cycles
back and re-brings up the login/password screen again. Apparently the
Plasma/X11 version of the desktop is not accepting my login credentials for
some reason. However, if I choose to brings up the Plasma/Wayland desktop, my
login credentials work just fine and the desktop comes up OK.

I have attached a copy of my .xsession-errors file hoping that might offer a
clue. (Guess I can only add one attachment at a time) will add results of doing
a hw-probe -all in a follow on post.