Public bug reported:

I switch to/from dual display on a tablet pc a few times a day. I switch
to dual display mode with a script doing

xrandr --screen 0 --fb 1600x2100
xrandr --output VGA1 --mode 1600x1200 --above LVDS1

and back to the single (laptop) screen with

xrandr --output VGA1  --off
xrandr --screen 0 --fb 1600x900

(I also set some wacom parameters back and forth to keep the tablet
input calibrated on the laptop screen when in dual mode, but I don't
think that's relevant.)

The problem is that when I  switch between the setups my application
windows are moved between workspaces. It seems that the distinction
between the physical screens and the workspaces is blurred, which may be
intentional (I can drag windows between workspaces). But each time I
switch display setup have to find all my application windows and move
them to where I want them, which is a bit irritating as I have quite a
few. I'm sorry if I've missed some option which will allow me to tie an
application window to a specific workspace.

I'm on Ubuntu 12.10 with unity version 6.12.0-0ubuntu0.2. I expected
each application window to stay in the workspace I put it, but it
usually doesn't.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity 6.12.0-0ubuntu0.2
ProcVersionSignature: Ubuntu 3.5.0-22.34-generic 3.5.7.2
Uname: Linux 3.5.0-22-generic x86_64
NonfreeKernelModules: openafs
.tmp.unity.support.test.0:
 
ApportVersion: 2.6.1-0ubuntu9
Architecture: amd64
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Tue Jan 22 09:53:06 2013
DistUpgraded: Fresh install
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus:
 openafs, 1.6.1, 3.5.0-21-generic, x86_64: installed
 openafs, 1.6.1, 3.5.0-22-generic, x86_64: installed
 vboxhost, 4.2.6, 3.5.0-21-generic, x86_64: installed
 vboxhost, 4.2.6, 3.5.0-22-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 
09) (prog-if 00 [VGA controller])
   Subsystem: Fujitsu Limited. Device [10cf:16d0]
InstallationDate: Installed on 2012-12-21 (31 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: FUJITSU LIFEBOOK T902
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-22-generic 
root=UUID=e5ea99fa-7ff4-45cc-93f2-00c04e901353 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/22/2012
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 2.04
dmi.board.name: FJNB25E
dmi.board.vendor: FUJITSU
dmi.board.version: D3
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU
dmi.chassis.version: LIFEBOOK T902
dmi.modalias: 
dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion2.04:bd11/22/2012:svnFUJITSU:pnLIFEBOOKT902:pvr10601581864:rvnFUJITSU:rnFJNB25E:rvrD3:cvnFUJITSU:ct10:cvrLIFEBOOKT902:
dmi.product.name: LIFEBOOK T902
dmi.product.version: 10601581864
dmi.sys.vendor: FUJITSU
version.compiz: compiz 1:0.9.8.6-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 quantal running-unity ubuntu

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https://bugs.launchpad.net/bugs/1102884

Title:
  windows move between workspaces switching dual display off

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