当我单击右上方下拉菜单上的任何元素时，某些元素开始频繁闪烁，并且 CPU 负载高达 100%，直到我单击某处鼠标按钮。控制台输出：
$ nautilus
Gtk-Message: Failed to load module "unity-gtk-module"
Gtk-Message: Failed to load module "unity-gtk-module"
(nautilus:5730): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
(nautilus:5730): GLib-GIO-CRITICAL **: g_dbus_interface_skeleton_unexport: assertion 'interface_->priv->connections != NULL' failed
(nautilus:5730): Gtk-CRITICAL **: gtk_icon_theme_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed
(nautilus:5730): GLib-GObject-WARNING **: invalid (NULL) pointer instance
(nautilus:5730): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
我该如何修复这个问题？
更新：此行为对于所有具有“旧式”菜单的应用程序均相同
