hele Silverkeepere moc děkuji, panel (horní i dolní) se objevil, paráda

terminál vypsal:
xubulik@xubulik:~/Plocha$ xfce4-panel
(xfce4-panel:2154): Wnck-WARNING **: Property _NET_WM_NAME contained invalid UTF-8
(xfce4-panel:2154): Wnck-WARNING **: Property _NET_WM_ICON_NAME contained invalid UTF-8
(xfce4-panel:2154): Wnck-WARNING **: Property _NET_WM_NAME contained invalid UTF-8
(xfce4-mixer-plugin:2160): xfce4-mixer-plugin-DEBUG: mixer_plugin->track_label = 'Master'
(xfce4-xkb-plugin:2158): GLib-CRITICAL **: g_hash_table_destroy: assertion `hash_table != NULL' failed
(xfce4-xkb-plugin:2158): GLib-CRITICAL **: g_hash_table_destroy: assertion `hash_table != NULL' failed
(xfce4-xkb-plugin:2158): GLib-CRITICAL **: g_hash_table_destroy: assertion `hash_table != NULL' failed
(xfce4-xkb-plugin:2158): Wnck-WARNING **: Property _NET_WM_NAME contained invalid UTF-8
(xfce4-xkb-plugin:2158): Wnck-WARNING **: Property _NET_WM_ICON_NAME contained invalid UTF-8
(xfce4-xkb-plugin:2158): Wnck-WARNING **: Property _NET_WM_NAME contained invalid UTF-8
(xfce4-xkb-plugin:2158): Wnck-WARNING **: Property _NET_WM_NAME contained invalid UTF-8
(xfce4-xkb-plugin:2158): Wnck-WARNING **: Property _NET_WM_ICON_NAME contained invalid UTF-8
(xfce4-panel:2154): Wnck-WARNING **: Property _NET_WM_NAME contained invalid UTF-8
(xfce4-panel:2154): Wnck-WARNING **: Property _NET_WM_ICON_NAME contained invalid UTF-8
tak ještě by mě zajímalo co to znamená a proč mi panel nešel spustit, díky