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[Launchpad Bug Tracker <1199877@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package gtk+3.0 - 3.8.6-0ubuntu2

---------------
gtk+3.0 (3.8.6-0ubuntu2) saucy; urgency=low

  * Backport fixes from git
  * debian/patches/git_frame_disconnect.patch
    debian/patches/git_frame_update.patch:
    - "This fixes high wake-up count from any application using GtkTreeView,
       even idle ones."
  * debian/patches/git_submenus_leak.patch:
    - "don't leak submenus", thanks Lars Uebernickel (lp: #1199877)

gtk+3.0 (3.8.6-0ubuntu1) saucy; urgency=low

  * New upstream version
  * debian/patches/git_padding_value.patch:
    - drop, the fix is the new version
  * debian/patches/git_list_handlers.patch: gtk was made, during
    the 3.8 cycle, to ignore the mimetype handlers with NoDisplay=true.
    The change turned out to be wrong and got reverted in 3.10, doing the
    same here. It makes, e.g shotwell to be listed again (lp: #1238149)
 -- Sebastien Bacher <seb128@xxxxxxxxxx>   Mon, 28 Oct 2013 10:50:18 -0700

** Changed in: gtk+3.0 (Ubuntu)
       Status: In Progress => Fix Released

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

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

Status in The Application Menu:
  Fix Committed
Status in Application Menu Indicator 13.10 series:
  Fix Committed
Status in The Ubuntu Power Consumption Project:
  New
Status in Unity:
  Invalid
Status in “gtk+3.0” package in Ubuntu:
  Fix Released
Status in “indicator-appmenu” package in Ubuntu:
  In Progress
Status in “unity” package in Ubuntu:
  Invalid
Status in “gtk+3.0” source package in Saucy:
  Fix Committed
Status in “indicator-appmenu” source package in Saucy:
  In Progress

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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