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[Tom Inglis <1514065@xxxxxxxxxxxxxxxxxx>]

I can confirm this issue, but on a regular desktop installation of
14.04.4, not a virtualised instance.

I think that this bug is related:

https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1295267

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https://bugs.launchpad.net/bugs/1514065

Title:
  Windows move in workspaces after a window resize event

Status in compiz-plugins-main package in Ubuntu:
  Confirmed

Bug description:
  I run Ubuntu 14.04 LTS as a VirtualBox guest (both with VB 4.3.x and
  5.x) using the default desktop. If I toggle the size of the screen
  (using Host-Right-Ctrl-F) from maximised to not maximised and then
  back again, the workspaces behave incorrectly. The same happens also
  if I save and restore a VirtualBox session from disk.

  Here is what goes wrong:

  - Maximised windows move between Workspaces
  - When activating the Workspaces viewer, maximised windows cannot be dragged to the Workspace they should be on - they appear to drag, and then "snap back" to their present (wrong) location
  - Unmaximising and re-maximising a window fixes the problem for that window only

  I have written a script to toggle the maximisation status of all
  windows, which resolves the problem.

  It is probably of note that this bug only affects maximised windows - if a window is not maximised then it remains on the correct workspace, and can
  be moved to any other without my 'reset' hack.

  I don't think the Workspace grid size makes any difference - I've had
  this happen with 3x2 and 3x3 arrangements.

  I have installed a brand new Ubuntu guest using the "ubuntu-14.04.2
  -desktop-amd64.iso" image and cannot reproduce the problem. It is
  perhaps the case that the problematic machine was installed using the
  "ubuntu-14.04-desktop-amd64.iso" image (I don't know if that would
  matter).

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