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[James Nissen <jimson1969@xxxxxxxxx>]

I've resolved this issue by loading unity-reset utility and resetting
via http://www.webupd8.org/2012/10/how-to-reset-compiz-and-unity-in-
ubuntu.html.  No more unity/compiz flickers and hangs.

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https://bugs.launchpad.net/bugs/1316311

Title:
  Unity launcher, top panel, and window titles flicker and disappear
  when clicking launcher for apps that have more than one instance
  running on it

Status in “unity” package in Ubuntu:
  Confirmed

Bug description:
  I upgraded my laptop from Ubuntu 13.10 to 14.04, shortly after the
  launch, and things were working pretty good.  However, after a recent
  software update, the 14.04 Unity launcher, top panel, and window
  titles all flicker and disappear, when clicking the launcher for an
  application that has multiple instances running (multiple left array
  indicators next to launcher).

  The first time I click the launcher, the whole desktop flickers,
  blanks out, then comes back.  The second time, everything but window
  contents disappears.  In this case, the window contents are unusable,
  and I have to restart my laptop.  This has become quite disruptive to
  my work day.

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