On Ubuntu 18.04, I recently installed Pantheon but then removed it and the PPAs using the appropriate method. However it now seems that the settings menu won't open, either from GUI or terminal. When I run gnome-control-center I get "Command not found but can be installed with..." and when I try to install it, I get "gnome-control-center is already the newest version". What's going on here? I already tried re-installing the ubuntu-desktop and apt dist-upgrade, apt autoremove and apt clean and still not luck.


It turns out that doing apt remove gnome-control-center and apt install gnome-control-center fixes this.

However when launching from terminal a Gtk message "Failed to load module 'pantheon-filename-module'" appears, so perhaps indicating an incomplete or incorrect clean-up.

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