[Bug 1696981] Re: fixrtc is ineffective when there is no battery for the RTC

[Alfonso Sanchez-Beato]

@smb the concrete problem this was solving was happening with an armhf
device running Ubuntu Core. UC assertions were not validated and a
system user could not be created if there was no network (no date
update). Not sure if this was breaking the system even if later you
connected the device.

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Title:
  fixrtc is ineffective when there is no battery for the RTC

Status in initramfs-tools package in Ubuntu:
  Incomplete

Bug description:
  When there is no battery for the RTC, fixrtc is not able to find a
  good enough date. To fix the clock, this script is using the last time
  the root filesystem was mounted, but as that is done before there is
  any network, and as after a reboot/poweroff the RTC time is always
  reset (because time is not kept due to lack of battery), the mount
  time will never be good.

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