有时无法通过 NetworkManager 连接到 WiFi(!)

Question

我遇到了一个问题，该问题仅出现在 Arch + Xfce + NetworkManager 中。如果我没有遗漏任何东西，那么在我的计算机上，Arch + Gnome + NetworkManager 或 Ubuntu 或 Arch + Xfce + wicd 中不会出现该问题。

当我尝试连接某些 (!) wifi 接入点时，我无法连接，并且 dmesg 中出现以下消息：

[27524.388055] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[27524.561891] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[27524.970483] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[27525.146824] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
................

[27478.260413] IPv6: ADDRCONF(NETDEV_CHANGE): wlp4s0: link becomes ready
[27509.173365] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[27509.639527] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[27524.388055] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[27524.561891] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[27524.970483] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[27525.146824] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[27539.858535] IPv6: ADDRCONF(NETDEV_CHANGE): wlp4s0: link becomes ready
................



[ 8380.749651] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[ 8380.934894] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[ 8383.002757] IPv6: ADDRCONF(NETDEV_CHANGE): wlp4s0: link becomes ready
[12001.369194] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[12001.796397] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[12009.764741] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[12010.196863] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
[12010.369083] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready

................

我尝试关闭 IPv6，但没有用。我还尝试过“ip link set wlp4s0 up/down”和类似的命令。