Adding group `gdm' (114)...
Done.
adduser: Warning: The home dir you specified already exists.
Adding system user `gdm'...
Adding new user `gdm' (104) with group `gdm'.
Home directory `/var/lib/gdm' already exists.
 * Reloading GNOME Display Manager configuration...  * Changes will take effect when all current X sessions have ended.
invoke-rc.d: initscript gdm, action "reload" failed.