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[Colin Ian King <1438301@xxxxxxxxxxxxxxxxxx>]

I'm actually running vivid server on this box, so I don't have a unity
session running.

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https://bugs.launchpad.net/bugs/1438301

Title:
  desktop machine suspends with systemd after ~3 minutes, does NOT
  suspend with upstart

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  For reasons I cannot fathom, my development server goes into deep
  suspend after ~3 minutes after startup with systemd, however, if I
  boot with upstart it does not.   This happens everytime I boot with
  systemd, the machine just goes into a deep suspend without me
  requesting it.

  I enabled "debug"; attached is a gzip'd syslog showing the activity -
  look at the end of the log, it goes into deep suspend. No idea why.

  acpi_listen is showing some curious audio plug/unplug events that seem
  to occur on this development box, so maybe these are being
  misinterpreted as suspend events.

  $ acpi_listen
  jack/headphone HEADPHONE plug
  jack/headphone HEADPHONE unplug
  jack/headphone HEADPHONE plug
  jack/headphone HEADPHONE unplug
  jack/headphone HEADPHONE plug
  jack/headphone HEADPHONE unplug

  ..but I am not seeing any other ACPI related events that could be
  triggering a suspend request from acpi_listen.

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