(vdkb2:6508): Gdk-CRITICAL **: gdk_font_from_description_for_display: assertion `font_desc != NULL' failed

(vdkb2:6508): GLib-GObject-CRITICAL **: g_signal_connect_closure_by_id: assertion `signal_id > 0' failed

(vdkb2:6508): GLib-GObject-CRITICAL **: g_signal_connect_closure_by_id: assertion `signal_id > 0' failed

(vdkb2:6508): Gdk-CRITICAL **: gdk_font_from_description_for_display: assertion `font_desc != NULL' failed