無法連接 WiFi

Question

我最近安裝了 Arch，但尚未設定。特別是，我無法連接到 WiFi，儘管它是可見的（在 Arch 中）。當我點擊它時，什麼也沒有發生。可能是什麼問題？

$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp5s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether 28:d2:44:16:42:e5 brd ff:ff:ff:ff:ff:ff
3: wlp4s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether 68:17:29:70:56:cf brd ff:ff:ff:ff:ff:ff
    inet6 fe80::6a17:29ff:fe70:56cf/64 scope link 
       valid_lft forever preferred_lft forever