Package: linuxptp
Version: 3.1-2.1
Severity: normal
Tags: patch
Dear Maintainer,
* What led up to the situation?
I am configuring PTP on BeagleBone black with Debian 11. It works fine if
timemaster.service is manually started.
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root@BeagleBone:~# systemctl status timemaster
* timemaster.service - Synchronize system clock to NTP and PTP time sources
Loaded: loaded (/lib/systemd/system/timemaster.service; enabled; vendor
preset: enabled)
Active: active (running) since Mon 2025-07-07 07:04:26 UTC; 1 day 4h ago
Docs: man:timemaster
Main PID: 1202 (timemaster)
Tasks: 4 (limit: 1024)
Memory: 1.0M
CPU: 3min 4.852s
CGroup: /system.slice/timemaster.service
|-1202 /usr/sbin/timemaster -m -l 6 -f /etc/linuxptp/timemaster.conf
|-1203 /usr/sbin/chronyd -n -f /var/run/timemaster/chrony.conf
|-1577 /usr/sbin/ptp4l -l 5 -f /var/run/timemaster/ptp4l.0.conf -H -i eth0
`-1578 /usr/sbin/phc2sys -l 5 -a -r -R 1.00 -z
/var/run/timemaster/ptp4l.0.socket -t [0:eth0] -n 0 -E ntpshm -M 0
Jul 08 11:12:04 BeagleBone ptp4l[1577]: [102971.583] [0:eth0] selected
local clock 3408e1.fffe.cbd9e4 as best master
-----
syslog:
-----
Jul 8 11:36:54 BeagleBone systemd[1]: Started Synchronize system clock to
NTP and PTP time sources.
Jul 8 11:36:54 BeagleBone timemaster[3592]: timemaster[104461.569]: process
3593 started: /usr/sbin/chronyd -n -f /var/run/timemaster/chrony.conf
Jul 8 11:36:54 BeagleBone timemaster: [104461.569] process 3593 started:
/usr/sbin/chronyd -n -f /var/run/timemaster/chrony.conf
Jul 8 11:36:54 BeagleBone timemaster[3592]: timemaster[104461.597]: process
3594 started: /usr/sbin/ptp4l -l 5 -f /var/run/timemaster/ptp4l.0.conf -H -i
eth0
Jul 8 11:36:54 BeagleBone timemaster: [104461.597] process 3594 started:
/usr/sbin/ptp4l -l 5 -f /var/run/timemaster/ptp4l.0.conf -H -i eth0
Jul 8 11:36:54 BeagleBone timemaster[3592]: timemaster[104461.613]: process
3595 started: /usr/sbin/phc2sys -l 5 -a -r -R 1.00 -z
/var/run/timemaster/ptp4l.0.socket -t [0:eth0] -n 0 -E ntpshm -M 0
Jul 8 11:36:54 BeagleBone timemaster: [104461.613] process 3595 started:
/usr/sbin/phc2sys -l 5 -a -r -R 1.00 -z /var/run/timemaster/ptp4l.0.socket -t
[0:eth0] -n 0 -E ntpshm -M 0
Jul 8 11:36:54 BeagleBone ptp4l: [104461.649] [0:eth0] port 1: INITIALIZING
to LISTENING on INIT_COMPLETE
Jul 8 11:36:54 BeagleBone ptp4l: [104461.654] [0:eth0] port 0: INITIALIZING
to LISTENING on INIT_COMPLETE
Jul 8 11:36:54 BeagleBone chronyd[3593]: chronyd version 4.0 starting
(+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +NTS +SECHASH
+IPV6 -DEBUG)
Jul 8 11:36:54 BeagleBone chronyd[3593]: Frequency 54.016 +/- 0.244 ppm
read from /var/lib/chrony/chrony.drift
Jul 8 11:36:54 BeagleBone chronyd[3593]: Using right/UTC timezone to obtain
leap second data
Jul 8 11:36:55 BeagleBone phc2sys: [104462.635] [0:eth0] Waiting for
ptp4l...
-----
However, phc2sys is not started at boot.
-----
root@BeagleBone:~# systemctl status timemaster
● timemaster.service - Synchronize system clock to NTP and PTP time sources
Loaded: loaded (/lib/systemd/system/timemaster.service; enabled; vendor
preset: enabled)
Active: active (running) since Tue 2025-07-08 11:43:39 UTC; 3min 45s ago
Docs: man:timemaster
Main PID: 562 (timemaster)
Tasks: 3 (limit: 1024)
Memory: 2.7M
CPU: 438ms
CGroup: /system.slice/timemaster.service
├─562 /usr/sbin/timemaster -m -l 6 -f /etc/linuxptp/timemaster.conf
├─568 /usr/sbin/chronyd -n -f /var/run/timemaster/chrony.conf
└─569 /usr/sbin/ptp4l -l 5 -f /var/run/timemaster/ptp4l.0.conf -S -i eth0
-----
syslog:
-----
Jul 8 11:43:39 BeagleBone timemaster[562]: timemaster[35.984]: process 568
started: /usr/sbin/chronyd -n -f /var/run/timemaster/chrony.conf
Jul 8 11:43:39 BeagleBone timemaster: [35.984] process 568 started:
/usr/sbin/chronyd -n -f /var/run/timemaster/chrony.conf
Jul 8 11:43:39 BeagleBone timemaster[562]: timemaster[36.032]: process 569
started: /usr/sbin/ptp4l -l 5 -f /var/run/timemaster/ptp4l.0.conf -S -i eth0
Jul 8 11:43:39 BeagleBone timemaster: [36.032] process 569 started:
/usr/sbin/ptp4l -l 5 -f /var/run/timemaster/ptp4l.0.conf -S -i eth0
-----
Any error or some suspected message is not found. It looks like timemaster does
not start phc2sys.
* What exactly did you do that was effective?
There is no message but the issue seems to be started timemaster starts before
eth0 is startup.
So, I am not sure this issue happes on other platform but at least happens on
BeagleBone Black every time.
The issue is prevented if timemaster.service is changed like this.
-----
[Unit]
Description=Synchronize system clock to NTP and PTP time sources
Documentation=man:timemaster
After=network-online.target
Wants=network-online.target
Conflicts=chronyd.service ntpd.service phc2sys.service ptp4l.service
[Service]
Type=simple
ExecStart=/usr/sbin/timemaster -m -l 6 -f /etc/linuxptp/timemaster.conf
[Install]
WantedBy=multi-user.target
-----
* What was the outcome of this action?
I confirmed reboot 6 times and the fix is works good.
-- System Information:
Debian Release: 11.11
APT prefers oldstable-updates
APT policy: (500, 'oldstable-updates'), (500, 'oldstable-security'), (500,
'oldstable')
Architecture: armhf (armv7l)
Kernel: Linux 5.10.168-ti-r79 (SMP w/1 CPU thread; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE
Locale: LANG=C, LC_CTYPE=C (charmap=UTF-8) (ignored: LC_ALL set to ja_JP.UTF8),
LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages linuxptp depends on:
ii libc6 2.31-13+deb11u11
linuxptp recommends no packages.
linuxptp suggests no packages.
-- Configuration Files:
/etc/linuxptp/ptp4l.conf [Errno 2] そのようなファイルやディレクトリはありません:
'/etc/linuxptp/ptp4l.conf'
/etc/linuxptp/timemaster.conf changed:
[ptp_domain 0]
interfaces eth0
delay 10e-6
[timemaster]
ntp_program chronyd
[chrony.conf]
include /etc/chrony.conf
[ntp.conf]
includefile /etc/ntp.conf
[ptp4l.conf]
[chronyd]
path /usr/sbin/chronyd
[phc2sys]
path /usr/sbin/phc2sys
[ptp4l]
path /usr/sbin/ptp4l
-- no debconf information
