https://bugzilla.kernel.org/show_bug.cgi?id=202533
--- Comment #8 from acollier21@gmail.com --- Thanks for your patience. Figured out the error. For whatever reason, there was a blacklist file in /etc/modprobe.d/ that was blacklisting the nouveau drivers. 4.20 recognized the blacklist while 4.19 did not.
Thanks for your direction!