ntpdate installs a cron job in /var/spool/cron/root . That happens through the postinstallation script. For such cronjobs /etc/cron.d/ was created. I would prefere adding a file /etc/cron.d/ntpdate-sync with the following (untested) content: --- 30 * * * * root /usr/bin/ntpdate-sync silent --- There is also no cron daemon installed by default. I also didn't see it as suggestion.
Needs to go to owner for meta networking.
This bugzilla doesn't cover meta-openembedded so this shouldn't be filed here.