After upgrading to Fedora 43 gdm was not able to start properly and the gdm service was reporting:
Gdm: GdmDisplay: Session never registered, failing
Gdm: Child process -2831 was already dead.
Issue solved by commenting the root cause in /etc/gdm/custom.conf:
WaylandEnable=false
into
#WaylandEnable=false
Relevant here is that this installation has had many upgrades and the configuration file was last updated in september 2018 ![]()
This might help others with same issue.
Would be good if the upgrade checks on this configuration!