I'm running Ubuntu MATE 16.04 (Xenial Xerus) - 64-bit "Desktop" version - in a HP laptop computer.
I have a question regarding NTP (Network Time Protocol): if i run the command "ntpq -p", I then get the following results:
$ ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
0.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
1.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
2.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
3.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
ntp.ubuntu.com .POOL. 16 p - 64 0 0.000 0.000 0.000
-mirrors.dominio 195.220.94.163 3 u 43 256 377 15.209 0.548 0.786
+ntp02.oal.ul.pt 194.117.9.138 2 u 194 256 377 10.934 -0.398 0.783
+a88-157-128-22. 212.113.174.246 3 u 7 256 377 7.905 -0.105 0.156
-smtp-in1.aqea.n 194.117.9.136 3 u 120 256 377 10.117 0.000 0.269
*ns.rnl.tecnico. 131.188.3.222 2 u 56 256 377 11.111 0.135 9.384
However, if I run the "peers" command in an "ntpdc" shell, I get an error message:
$ ntpdc
ntpdc> peers
localhost: timed out, nothing received
***Request timed out
ntpdc> quit
I haven't changed the NTP configuration file (/etc/ntp.conf) from its default configuration. The drift file / driftfile "/var/lib/ntp/ntp.drift" did not exist, so I created it using "touch /var/lib/ntp/ntp.drift", changed its ownership to the "ntp" user and group (using "chown ntp:ntp /var/lib/ntp/ntp.drift") and even rebooted the computer. This did not make any difference.
The "localhost: timed out, nothing received" error happens regardless if I run it as "ntpdc" or "sudo ntpdc", and it happens regardless if I'm running the "ufw" firewall or not.
The log file /var/log/syslog has the following seemingly related entries:
Jul 17 14:48:08 myhostname ntpd[1467]: kernel reports TIME_ERROR: 0x41: Clock Unsynchronized
Jul 17 14:52:16 myhostname ntpd[1467]: 91.189.89.199 local addr 192.168.1.2 -> <null>
Jul 17 14:52:20 myhostname ntpd[1467]: 91.189.94.4 local addr 192.168.1.2 -> <null>
Jul 17 14:52:34 myhostname ntpd[1467]: 5.135.59.152 local addr 192.168.1.2 -> <null>
Jul 17 14:52:40 myhostname ntpd[1467]: 62.48.148.210 local addr 192.168.1.2 -> <null>
I'm guessing that the error "kernel reports TIME_ERROR: 0x41: Clock Unsynchronized" is relevant.
The "ntp" service is running:
$ systemctl status ntp
● ntp.service - LSB: Start NTP daemon
Loaded: loaded (/etc/init.d/ntp; bad; vendor preset: enabled)
Active: active (running) since Dom 2016-07-17 14:42:23 WEST; 1h 20min ago
Docs: man:systemd-sysv-generator(8)
Process: 1442 ExecStart=/etc/init.d/ntp start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/ntp.service
└─1467 /usr/sbin/ntpd -p /var/run/ntpd.pid -g -u 109:116
Jul 17 14:42:27 myhostname ntpd[1467]: Soliciting pool server 62.48.148.210
Jul 17 14:42:27 myhostname ntpd[1467]: receive: Unexpected origin timestamp from 5.135.59.152
Jul 17 14:42:28 myhostname ntpd[1467]: Soliciting pool server 2001:690:2100:80::1
Jul 17 14:42:28 myhostname ntpd[1467]: Soliciting pool server 91.189.89.199
Jul 17 14:42:29 myhostname ntpd[1467]: Soliciting pool server 91.189.94.4
Jul 17 14:48:08 myhostname ntpd[1467]: kernel reports TIME_ERROR: 0x41: Clock Unsynchronized
Jul 17 14:52:16 myhostname ntpd[1467]: 91.189.89.199 local addr 192.168.1.2 -> <null>
Jul 17 14:52:20 myhostname ntpd[1467]: 91.189.94.4 local addr 192.168.1.2 -> <null>
Jul 17 14:52:34 myhostname ntpd[1467]: 5.135.59.152 local addr 192.168.1.2 -> <null>
Jul 17 14:52:40 myhostname ntpd[1467]: 62.48.148.210 local addr 192.168.1.2 -> <null>
Could you help me to troubleshoot this, please?
