我最近按照本指南在全新安装的 Ubuntu 19.10 上使无线网络正常运行：https://www.linuxbabe.com/ubuntu/connect-to-wi-fi-from-terminal-on-ubuntu-18-04-19-04-with-wpa-supplicant#comment-46373
启动时 DHCP 服务运行，我收到以下错误：
ieee80211 phy0: brcmf_inetaddr_changed: fail to get arp ip table err:-52
所以我 Alt-F4，登录并使用 手动运行它sudo dhclient。我收到此错误：
ieee80211 phy0: brcmf_inetaddr_changed: fail to get arp ip table err:-52
cmp: E0F on /tmp/tmp.Itr1VGx0mk which is empty
但后来我得到了一个 IP，一切似乎都正常了。以下是日志文件的输出：
-- Reboot --
Mar 02 04:57:03 ubu-serv systemd[1]: Started DHCP Client.
Mar 02 04:57:03 ubu-serv dhclient[806]: Internet Systems Consortium DHCP Client 4.4.1
Mar 02 04:57:03 ubu-serv dhclient[802]: Internet Systems Consortium DHCP Client 4.4.1
Mar 02 04:57:03 ubu-serv dhclient[802]: Copyright 2004-2018 Internet Systems Consortium.
Mar 02 04:57:03 ubu-serv dhclient[802]: All rights reserved.
Mar 02 04:57:03 ubu-serv dhclient[802]: For info, please visit https://www.isc.org/software/dhcp/
Mar 02 04:57:03 ubu-serv dhclient[806]: Copyright 2004-2018 Internet Systems Consortium.
Mar 02 04:57:03 ubu-serv dhclient[806]: All rights reserved.
Mar 02 04:57:03 ubu-serv dhclient[806]: For info, please visit https://www.isc.org/software/dhcp/
Mar 02 04:57:03 ubu-serv dhclient[806]:
Mar 02 04:57:03 ubu-serv dhclient[806]: Listening on LPF/wlp3s0/f4:5c:89:b0:4d:7b
Mar 02 04:57:03 ubu-serv dhclient[802]: Listening on LPF/wlp3s0/f4:5c:89:b0:4d:7b
Mar 02 04:57:03 ubu-serv dhclient[802]: Sending on LPF/wlp3s0/f4:5c:89:b0:4d:7b
Mar 02 04:57:03 ubu-serv dhclient[802]: Sending on Socket/fallback
Mar 02 04:57:03 ubu-serv dhclient[802]: DHCPREQUEST for 192.168.1.5 on wlp3s0 to 255.255.255.255 port 67 (xid=0x58943a1f)
Mar 02 04:57:03 ubu-serv dhclient[806]: Sending on LPF/wlp3s0/f4:5c:89:b0:4d:7b
Mar 02 04:57:03 ubu-serv dhclient[806]: Sending on Socket/fallback
Mar 02 04:57:03 ubu-serv dhclient[806]: DHCPREQUEST for 192.168.1.5 on wlp3s0 to 255.255.255.255 port 67 (xid=0x58943a1f)
Mar 02 04:57:06 ubu-serv dhclient[806]: DHCPREQUEST for 192.168.1.5 on wlp3s0 to 255.255.255.255 port 67 (xid=0x58943a1f)
Mar 02 04:57:06 ubu-serv dhclient[802]: DHCPREQUEST for 192.168.1.5 on wlp3s0 to 255.255.255.255 port 67 (xid=0x58943a1f)
Mar 02 04:57:06 ubu-serv dhclient[806]: DHCPACK of 192.168.1.5 from 192.168.1.1 (xid=0x1f3a9458)
Mar 02 04:57:06 ubu-serv dhclient[802]: DHCPACK of 192.168.1.5 from 192.168.1.1 (xid=0x1f3a9458)
Mar 02 04:57:06 ubu-serv dhclient[802]: cmp: EOF on /tmp/tmp.5Go3SNkqUg which is empty
Mar 02 04:57:06 ubu-serv dhclient[806]: bound to 192.168.1.5 -- renewal in 40109 seconds.
Mar 02 04:57:06 ubu-serv dhclient[802]: bound to 192.168.1.5 -- renewal in 40109 seconds.
Mar 02 04:57:06 ubu-serv dhclient[1022]: Killed old client process
Mar 02 04:57:06 ubu-serv dhclient[1022]: Killed old client process
Mar 02 04:57:07 ubu-serv dhclient[1022]: DHCPRELEASE of 192.168.1.5 on wlp3s0 to 192.168.1.1 port 67 (xid=0x4484af0b)
Mar 02 04:57:08 ubu-serv systemd[1]: dhclient.service: Succeeded.`
如何才能使 DHCP 在启动时成功运行？
作为参考，我的硬件是 MacBook Pro，2015 年末。