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[Phil Boutros <1199877@xxxxxxxxxxxxxxxxxx>]

Same thing here, after upgrading to 16.10, and killing Owncloud does
seem to "solve" it.

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https://bugs.launchpad.net/bugs/1199877

Title:
  unity-panel-service memory leak and 100% CPU usage

Status in Application Menu Indicator:
  Fix Released
Status in Application Menu Indicator 13.10 series:
  Fix Released
Status in The Ubuntu Power Consumption Project:
  Fix Released
Status in Unity:
  Invalid
Status in Ubuntu:
  Fix Released
Status in indicator-appmenu package in Ubuntu:
  Fix Released
Status in unity package in Ubuntu:
  Invalid
Status in The Saucy Salamander:
  Fix Released
Status in indicator-appmenu source package in Saucy:
  Fix Released

Bug description:
  Impact: high CPU/memory usage from unity-panel-service

  Test case:

  Open a large image in the GIMP and activate a lot of items from the
  global menu. Using shortcuts is enough and faster to reproduce this
  bug (I've always used Ctrl+A and Ctrl+Shift+A). Memory usage of unity-
  panel-service increases steadily and it uses a lot of CPU shortly
  after activating the menu items in a short time.

  Regression potential: check that the menus are stable/working as they
  should

  ---------
  Just going about my business on Ubuntu Raring amd64 on an x230 and I heard the fan kick into action.  top showed me that unity-panel-service was consuming all the free cycles on one of my CPUs.  I killed it before my machine overheated, so I didn't attach a debugger to see why it was totally pegging out a  CPU.

  I'm not sure if this adds any context, but I was using a LibreOffice
  spreadsheet and I could not insert a table because the menu had lost
  it's mind, and then I observed the overly loaded CPU a very short
  while after that.

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