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[Robert Ancell <robert.ancell@xxxxxxxxxxxxx>]

I think this might be the XHasMessages property that is being set, since
the patch for that doesn't stop Changed from being emitted if the value
has not changed. The other properties seem to correctly check if they
are changed.

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https://bugs.launchpad.net/bugs/1376357

Title:
  lightdm writing the same DEBUG message to /var/log/lightdm/lightdm.log

Status in “lightdm” package in Ubuntu:
  Incomplete

Bug description:
  I was trying to figure out where excessive file system writes were
  coming from on the ubuntu phone (to try to reduce flash writes and hence reduce power
  consumption) and I spotted that /var/log/lightdm/lightdm.log is getting the same debug message written to every every 300 seconds:

  tail -f /var/log/lightdm/lightdm.log
  [+5109.66s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+5409.67s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+5709.66s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+6009.66s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+6309.64s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+6609.65s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+6909.67s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+7209.66s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+7509.66s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+7809.57s] DEBUG: User /org/freedesktop/Accounts/User32011 changed
  [+8109.65s] DEBUG: User /org/freedesktop/Accounts/User32011 changed

  while this isn't much of a message, it still is causing file system
  writes every 5 minutes for the same debug message. Is this necessary?
  The fact that it is the same message about the same account and that
  it occurs every 300 seconds make me wonder if we can cull this
  particular piece of repeated logging.

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