Removing argyll (1.5.1-5ubuntu1) ...
Removing browser-plugin-gnash (0.8.11~git20130903-3ubuntu1) ...
Removing gnome-core (1:3.8+4ubuntu3) ...
Removing caribou-antler (0.4.13-0ubuntu1) ...
Removing caribou (0.4.13-0ubuntu1) ...
Removing dconf-tools (0.20.0-1) ...
Removing dconf-editor (0.20.0-1) ...
Removing fonts-cantarell (0.0.15-1) ...
Removing gdebi (0.9.5.3ubuntu2) ...
Removing gdebi-core (0.9.5.3ubuntu2) ...
Removing gdm (3.10.0.1-0ubuntu3.1) ...
dpkg: error processing package gdm (--remove):
 subprocess installed pre-removal script returned error exit status 10