我运行 gnome 17.04 没有问题。我清理了安装的 Ubuntu 17.1，一切都很好，除了在关机/重启时它挂起并显示以下错误。关闭的唯一方法是硬重启，这可能对硬件不利。我该如何解决这个问题？
Wlp6s0: failed to remove key (1, ff:ff:ff:ff:ff:ff) from hardware (-22)
Wlp6s0: failed to remove key (2, ff:ff:ff:ff:ff:ff) from hardware (-22)