On Sat, 2019-11-23 at 10:09 -0500, Sam Varshavchik wrote: > Tom Horsley writes: > > > On Sat, 23 Nov 2019 08:59:02 -0500 > > Sam Varshavchik wrote: > > > > > Anyone know where to investigate this further? > > > > The linux app that syncs to the hardware is "hwclock" (which > > has various obscure parameters described in the man page). > > > > You could make a script to sync with hwclock then reboot > > and see if the time is more in sync when it comes back. > > That would verify it isn't being synced (but, unfortunately, > > wouldn't help track down where the hwclock call ought > > to happen). > > I would expect that something would already be doing that. > > > Or maybe just replace the cmos battery on the motherboard > > and see if it get better :-). > > Checking some other boxes I just rebooted, only this one is griping > about > the clock. > > All these boxes are up 24/7. The longest they've been without power > is about > a week, when power's been out after a hurricane. Plus an occasional > day of > downtime, every other year or so, when power goes out for other > reasons. > > Some of those boxes are just as old as this one. Something has to be > syncing > the system time to the hardware clock on a reboot, otherwise their > clocks > would've drifted just as much. Maybe the other motherboards don't > drain the > battery at all when system power is on, and this one does. > > So, hwclock must be getting synced. But I don't see where hwclock > would be > getting called from. grepping /lib/systemd/system finds nothing. > hwclock > itself comes from util-linux, which doesn't install anything there. > Is chrony itself supposed to keep the hw clock synced? >From https://chrony.tuxfamily.org/manual.html#rtcsync-directive:: 4.2.55 rtcsync The rtcsync directive enables a mode where the system time is periodically copied to the real time clock (RTC). On Linux the RTC copy is performed by the kernel every 11 minutes. This directive cannot be used when the normal RTC tracking is enabled, i.e. when the rtcfile directive is used. On Mac OS X, chronyd will perform the RTC copy every 60 minutes when the system clock is in a synchronised state. On other systems this directive does nothing. /Louis _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
