[Bug 1157122] Re: PrepareFor{Sleep, Shutdown} (false) signals not emitted

[Launchpad Bug Tracker]

This bug was fixed in the package systemd - 198-0ubuntu9

---------------
systemd (198-0ubuntu9) raring; urgency=low

  * debian/tests/control: Add libpam-systemd dependency for logind test, as
    it checks for the mounted cgroup. Mounting that moved into libpam-systemd,
    see 198-0ubuntu7.
  * Drop usr/lib/systemd/ from systemd-services, this doesn't belong there and
    is already installed into systemd.
  * 0016-Add-poweroff-reboot-suspend-hibernate-fallback.patch: Send
    PrepareFor{Sleep,Shutdown}() signals with "false" after the operation
    finished. Thanks to Iain Lane for the initial patch! (LP: #1157122)
 -- Martin Pitt <martin.pitt at ubuntu.com>   Tue, 26 Mar 2013 11:08:39 +0100

** Changed in: systemd (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1157122

Title:
  PrepareFor{Sleep,Shutdown} (false) signals not emitted

Status in “systemd” package in Ubuntu:
  Fix Released

Bug description:
  Per

    http://www.freedesktop.org/wiki/Software/systemd/inhibit

  "PrepareForShutdown(false) may be subscribed to by applications which
  want to be notified about system resume events. Note that this will
  only be sent out for suspend/resume cycles done via logind, i.e.
  generally only for high-level user-induced suspend cycles, and not
  automatic, low-level kernel induced ones which might exist on certain
  devices with more aggressive power management. "

  (I think it means s/Shutdown/Sleep in the first sentence)

  Our systemd has a patch 0016-Add-poweroff-reboot-suspend-hibernate-
  fallback.patch which calls the executables from pm-utils in the case
  that the systemd D-Bus API isn't available (which is the case for us).
  Usually, logind calls shutdown/suspend/... methods via systemd jobs.
  In our case, since we call these executables directly, the jobs aren't
  used and so the standard systemd Job* signals aren't sent. It's these
  signals that logind listens for to know when to emit the
  PrepareFor{Sleep,Shutdown} (false) signals.

  I attach a strawman patch (diff of a diff - look at it after applying)
  which explicitly sends the signal and does some other needed cleanups
  (see bus_message_filter for the call site for where the signal is
  usually sent). Let me know what you think.

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