I've upgraded Linux using ULN 7.1 -> 7.9 and the GNOME Desktop is Blank

Hello

I've updated my Oracle Guest VM running on Oracle VM Server 3.4 from Linux 7.1 to Linux 7.7

Everything went well except that the GNOME GUI is not working - a blank screen.

Running this command gives..

# systemctl status gdm

● gdm.service - GNOME Display Manager

  Loaded: loaded (/usr/lib/systemd/system/gdm.service; enabled; vendor preset: enabled)

  Active: active (running) since Wed 2021-01-20 12:45:20 GMT; 2min 10s ago

 Process: 1386 ExecStartPost=/bin/bash -c TERM=linux /usr/bin/clear > /dev/tty1 (code=exited, status=0/SUCCESS)

 Main PID: 1343 (gdm)

  CGroup: /system.slice/gdm.service

          └─1343 /usr/sbin/gdm

Jan 20 12:45:19 LWS-DEV4B-TEMP systemd[1]: Starting GNOME Display Manager...