Commented them out and performed apt update. Then purged the following packages:
apt purge gnome-settings-daemon gdm3 gnome-control-center gnome-initial-setup gnome-power-manager gnome-shell uatter ubuntu-desktop ubuntu-session
This removed these packages, then reinstalled all pre-existing packages.
Found the following two entries had been added to /etc/apt/ sources. list following automatic updates. ftp.us. debian. org/debian experimental main ftp.us. debian. org/debian sid main
deb [trusted=yes] http://
deb [trusted=yes] http://
Commented them out and performed apt update. Then purged the following packages: daemon gdm3 gnome-control- center gnome-initial-setup gnome-power-manager gnome-shell uatter ubuntu-desktop ubuntu-session
apt purge gnome-settings-
This removed these packages, then reinstalled all pre-existing packages.
Reboot returned system to normal functionality.