运行 Ubuntu 16.04 桌面版。有人知道为什么 timesyncd 几分钟后就不断从我用 DHCP 设置的 NTP 服务器切换到 ntp.ubuntu.com 吗？
-- Logs begin at Sun 2016-08-21 00:17:02 EDT, end at Wed 2016-08-24 21:01:43 EDT. --
Aug 21 09:11:37 portege-ubuntu systemd-timesyncd[15762]: Synchronized to time server 192.168.11.1:123 (192.168.11.1).
Aug 21 09:11:56 portege-ubuntu systemd-timesyncd[15780]: Synchronized to time server 91.189.91.157:123 (ntp.ubuntu.com).
Aug 21 17:46:08 portege-ubuntu systemd-timesyncd[20508]: Synchronized to time server 192.168.11.1:123 (192.168.11.1).
Aug 21 17:51:47 portege-ubuntu systemd-timesyncd[20559]: Synchronized to time server 91.189.89.198:123 (ntp.ubuntu.com).