It looks like gtk has ended up in a broken state given the error messages after the attempting to open the dialog:
debconf: unable to initialize frontend: Gnome^M debconf: (Unable to load Gtk -- is libgtk2-perl installed?)^M debconf: falling back to frontend: Dialog^M Processing triggers for hicolor-icon-theme ...^M ^M (gtk-update-icon-cache-3.0:6517): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.32.4/./gobject/gtype.c:2722: You forgot to call g_type_init()^M ^M (gtk-update-icon-cache-3.0:6517): GLib-GObject-CRITICAL **: /build/buildd/glib2.0-2.32.4/./gobject/gtype.c:2722: You forgot to call g_type_init()^M ^M (gtk-update-icon-cache-3.0:6517): GLib-GObject-CRITICAL **: g_type_interface_add_prerequisite: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed^M ^M (gtk-update-icon-cache-3.0:6517): GLib-CRITICAL **: g_once_init_leave: assertion `result != 0' failed^M ^M (gtk-update-icon-cache-3.0:6517): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion `G_TYPE_IS_INSTANTIATABLE (instance_type)' failed^M ^M (gtk-update-icon-cache-3.0:6517): GLib-CRITICAL **: g_once_init_leave: assertion `result != 0' failed^M ^M (gtk-update-icon-cache-3.0:6517): GLib-GObject-CRITICAL **: g_object_new: assertion `G_TYPE_IS_OBJECT (object_type)' failed^M Segmentation fault (core dumped)^M Did you happen to catch the core dump? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1298281 Title: prompt to restart services in text mode during an upgrade in graphic mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1298281/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
