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[Bug 768168] [NEW] Windows become hidden/minimized when switching viewports


Public bug reported:

Binary package hint: compiz

To reproduce:

- Configure Compiz to use a 3x3 grid (or something similar) of viewports
(the Desktop Wall plugin)

- Open several windows on different viewports

- Switch between viewports using Viewport Switcher plugin hotkeys

- Observe that sometimes the windows on the viewport you switched from
become hidden. Switching back to the viewport, they reappear only on

- Sometimes, they also reappear when switching viewports again, or
invoking Expo.

This is with Unity, so I cannot distinguish between minimized and
"disappeared" windows.

Note that this occurs on a relatively slow Asus EEE mini-notebook. I
don't recall seeing this on my faster computer with a similar Natty

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: compiz 1:0.9.4+bzr20110415-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,imgpng,snap,grid,mousepoll,move,gnomecompat,wall,resize,place,unitymtgrabhandles,put,regex,vpswitch,session,animation,expo,workarounds,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
 status: connected
 enabled: enabled
 dpms: On
 modes: 1024x600 1024x600
 status: disconnected
 enabled: disabled
 dpms: Off
Date: Thu Apr 21 10:51:02 2011
DistroCodename: natty
DistroVariant: ubuntu
 Intel Corporation Mobile 945GME Express Integrated Graphics Controller [8086:27ae] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:8340]
   Subsystem: ASUSTeK Computer Inc. Device [1043:8340]
MachineType: ASUSTeK Computer INC. 1000HE
PackageArchitecture: all
 PATH=(custom, user)
ProcKernelCmdLine: root=/dev/mapper/vg-root ro quiet splash
ProcVersionSignature_: Ubuntu 2.6.38-8.42-generic
Renderer: Unknown
SourcePackage: compiz
UpgradeStatus: Upgraded to natty on 2011-04-20 (0 days ago)
XorgConf: Error: [Errno 13] Lupa evätty: '/etc/X11/xorg.conf'
dmi.bios.date: 03/05/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0607
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1000HE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTek Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0607:bd03/05/2009:svnASUSTeKComputerINC.:pn1000HE:pvrx.x:rvnASUSTeKComputerINC.:rn1000HE:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x:
dmi.product.name: 1000HE
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

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

** Tags: apport-bug compiz-0.9 i386 natty running-unity ubuntu

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  Windows become hidden/minimized when switching viewports

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