On Tue, Sep 11, 2012 at 8:27 PM, Thomas Bächler <thomas@xxxxxxxxxxxxx> wrote: > 2) When chrony is not running, systemd-timedated runs periodically to > adjust the hardware clock for drift (AFAIK, not sure that is the job > that timedated does). No. When chrony isn't running, the hwclock isn't getting adjusted at all. The only thing systemd does on startup is warp the system clock if and only if the RTC is running in localtime. systemd-timedated's job is to provide a DBus interface to change system time and date settings: SetTime, SetTimezone, SetLocalRTC (whether RTC is in localtime), SetNTP (whether NTP is enabled) It's used by gnome-control-center, at least. The SetNTP call uses the ntp-units.d directory to select an implementation.
