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[ingo <ingo.randolf@xxxxxxxxx>]

hitting the same issue once and a while.
it happened again yesterday. i could record some traffic on dbus:

this pastebin shows the log with high performance impact.
at the end of the log things are getting normal again:
http://pastebin.com/v55umuBF

this pastebin in comparison shows the traffic after things settled and the phone was usable again.
http://pastebin.com/CrQ0Z3K2

both recordings are about 1 minute.

maybe this helps to track it down...

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Touch seeded packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1480877

Title:
  Access points' "PropertiesChanged" dbus signals freeze UI on mobile
  devices

Status in indicator-network package in Ubuntu:
  Incomplete
Status in network-manager package in Ubuntu:
  Incomplete

Bug description:
  Krillin, rc-proposed, r83

  
  DESCRIPTION:
  I've been trying to track down the cause of the occasional UI freezes on my Krillin device, and I noticed that whenever the UI freezes for 2-4 seconds, I get a burst of "PropertiesChanged" signals in dbus-monitor

  Here's a log of what's shown in dbus-monitor:
  http://pastebin.ubuntu.com/11992322/

  I'd guess the problem is in the code that actually catches the signals
  and acts accordingly.

  HOW TO REPRODUCE: 
  1) Move to a place where many wifi hotspots are available
  2) Connect the device via USB and run "phablet-shell" and then "dbus-monitor"
  3) Use the device while keeping an eye on dbus-monitor output

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