At some point, I was able to use the GDM login screen with
fedorainfinity-gdm-theme and doing my normal things with
fedora for at least two weeks after an install and somewhere
along the way after a reboot, GDM failed to bring up the
login screen. Crl-Alt-F1, and logging in a term session,
running Top - revealed that the gdmgreeter was running
a full solid 95%
I proceeded to use add Enable=True under the [Debug] section
in /etc/gdm/custom.conf and noticed on a gdm-restart - the debug
information was spewed in /var/log/messages file. LOTS of debug
data there. It appears that the debug stops spewing at the greeter
message handshake - but still running 85% CPU load.
Double Darn. Ok, fine.
The next step was to cd /usr/share/gdm, and look at the default.conf
file. At line 520: