[Bug 1541532] Re: migrate UTC setting from /etc/default/rcS to adjtime

[Alkis Georgopoulos]

With the switch to configure UTC from /etc/adjtime instead of
/etc/default/rcS, I'm having the following regression:

I've installed Xenial some months ago and it's fully updated.
Without customizing it, my /etc/adjtime reads:
0.0 0 0
0

The regression is this:
# timedatectl set-local-rtc 1
Failed to set local RTC: Failed to set RTC to local/UTC: Input/output error

I can work around the issue with two ways:
1) Completely delete /etc/adjtime. Then `timedatectl set-local-rtc 1` generates it, and `timedatectl set-local-rtc 0` deletes it with no errors.
2) Add "LOCAL" or "UTC" to the end of /etc/adjtime. Then again  `timedatectl set-local-rtc XXX` works as expected.

Am I supposed not to have that file?
Should I file a bug report against systemd so that it doesn't have parse errors if the LOCAL/UTC keyword is missing?

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https://bugs.launchpad.net/bugs/1541532

Title:
  migrate UTC setting from  /etc/default/rcS to adjtime

Status in installation-guide package in Ubuntu:
  Fix Released
Status in lupin package in Ubuntu:
  Fix Released
Status in mbr package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released
Status in sysvinit package in Ubuntu:
  Fix Released
Status in util-linux package in Ubuntu:
  Fix Released
Status in mbr package in Debian:
  New

Bug description:
  This has been an Ubuntu delta in systemd and perhaps other Ubuntu
  packages for a long time. But /etc/default/rcS is a SysV-ism, and no
  other setting in there is relevant. Steps:

   * Bump the version guard in systemd.conf for migrating the actual setting (keep until 16.04 LTS)
   * Ensure that we only look at the LOCAL setting during boot, and do no actual drift correction at boot, as the kernel does that by itself.
   * grep the archive for software which might directly look at or even write that file (Ubuntu specific config tools and the like).

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