当我单击注销按钮时，所有程序都会关闭，面板会消失等，正如预期的那样，但它不会转到登录屏幕，只是停留在查看壁纸和鼠标光标。我找到了解决此问题的“解决方法”，即更改为不同的 tty 并运行sudo systemctl restart lightdm。
journalctl -p err显示：
sty 21 12:30:47 tatooine gnome-session-binary[2190]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
sty 21 12:30:47 tatooine gnome-session-binary[2190]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
sty 21 12:30:47 tatooine gnome-session-binary[2190]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
sty 21 12:30:47 tatooine gnome-session-binary[2190]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
sty 21 12:30:47 tatooine gnome-session-binary[2190]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
sty 21 12:30:47 tatooine gnome-session-binary[2190]: GLib-GObject-CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed