Today I triggered a few updates that were listed in Webmin (a remote management web-based console for those not familiar), but should have been the same if dnf update were issued. After that I cannot login to the GUI, which I could login to a few days ago. There was an update listed for wayland. All packages are now up to date.
I can login to a text login (Ctrl-Alt-F3) or a GUI remote session from a Windows PC (which uses XRDP).
On the PC itself, the GUI login appears, accepts a password but for any user does not allow a login (just goes back the initial screen where users login from). There are a couple of messages that have not appeared previously in journactl:
Server gdm-wayland-session[965679]: Gdm: gdm-wayland-session takes one argument (the session)
Server gdm[1803]: Gdm: GdmDisplay: Session never registered, failing
These may identify the fault or there may be some more diagonstics to do.
How can I resolve this?