[systemd-devel] Cannot find a way to get time read from RTC during boot

[Kevin P. Fleming]

Thanks, I agree. I could some up with something which ran timedatectl
to set the system time from the RTC, but the hwclock tool is already
there for that purpose.

I'll need to investigate why this script exits without making any
changes when systemd is running; either the authors expected some part
of systemd to read the RTC, or they expect some other service/tool to
do it.

On Thu, Mar 12, 2020 at 2:02 PM Mike Gilbert <floppym at gentoo.org> wrote:
>
> On Thu, Mar 12, 2020 at 7:13 AM Kevin P. Fleming <kevin at km6g.us> wrote:
> > Prior to systemd, with the 'hwclock' package installed, a udev rule
> > would trigger reading of the RTC and setting the system clock when
> > /dev/rtc0 appeared. With systemd running, the script run by that udev
> > rule is suppressed, it doesn't do anything.
> >
> > With a system using solely systemd-provided services, what's the
> > proper mechanism to get the time read from an RTC whose driver is
> > loaded by systemd-modules-load.service?
>
> Your use case is likely not covered by "systemd-provided" services.
>
> I think your best bet would be to "un-supress" that hwclock udev rule.