Last night I upgraded using dnf to the latest kernel-4.18.0-513.9.1-el8_9.x86_64.
I then rebooted, and everything seemed normal until after I logged back in with my non-privilged account (admin). But from that point on, I cannot do anything using the Gnome GUI desktop. There is absolutely no response from the GUI.
Also, as I have access to the Root (root) account and another non-privileged account, I logged in with them too. The GUI did not respond when logged into either of them either.
Alternatively, I then switched to an alternate terminal using the keystroke -- and logged in with the admin account successfully. I thought the problem might have been with auditd and perhaps the /var/log/audit filesystem hitting the threshold of space_left but it was not the problem. I also noticed as a result that there is no log-data in /var/log/messages either. If I stop/start, or restart (explicitly) using systemctl the rsyslog.service I still see no new data in the /var/log/messages file. I also noticed that networking is actually functioning properly.
Right now, I am probing around seeking the root cause of this failure, but would love suggestions on what else might cause this strange behavior.