In previous OS releases, such as Debian 8.8, systemd-timesyncd was used as the
network time synchronization.
It did an initial sync, then as it determined the time base correction
necessary, corrected for the frequency error in the BBB’s main clock, and kept
increasing the time between network time syncs, until it was running/syncing
about once every thirty minutes.
You saw a bunch of line items in the syslogs that looked like the following
Dec 3 13:34:50 BBG4 systemd-timesyncd[209]: interval/delta/delay/jitter/drift 2048s/-0.001s/0.053s/0.011s/-72ppm
Dec 3 14:08:58 BBG4 systemd-timesyncd[209]: interval/delta/delay/jitter/drift 2048s/+0.002s/0.055s/0.012s/-71ppm
Now, in Debian 9.2, systemd-timesyncd is used for network time synchronization.
But in the syslogs, you only see a single report of time sync at the first
boot, and nothing further.
Is systemd-timesyncd still doing a network sync every 30 minutes and just not
logging it to syslog, or is it doing it less frequently?
If it is doing it less frequently, what is the easiest way to get back to the
30 minute re-sync cycle with the clock correction?
— Graham