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[Bug 928446] [NEW] Window decorations disappear when enabling/disabling external monitor


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After turning on an external monitor, the window decoration disappeared
on one of my open windows.

To reproduce:
1) Boot 12.04; login
1a) (optional?) Work for awhile - browse in FF, email with Thunderbird, use the terminal, etc
2) Launch thunderbird; compose a new message in a new window
3) Plug in an external monitor
4) Launch nvidia-settings; enable the second monitor in Twinview mode (I had to press 'Apply' twice to get the OS to use the external monitor; the first time did not result in anything displayed on the external monitor. I think this is a separate bug)

Expected results:
Desktop/launcher/panel appear on the second monitor. All open, non-maximized windows retain their decoration

Actual results:
Desktop/launcher/panel appear on the second monitor. The compose window from step #2 loses its decoration. The missing decoration seemed permanent rather than an artifact - using super-w to show all windows still showed the window sans decoration.

Maximizing then minimizing the window w/ missing decoration (by double-
clicking the place where the title bar should have been) resulted in the
decoration being restored.

The external monitor is 1280x1024 while the internal monitor is
1440x900; I am not sure if that is relevant.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2
Uname: Linux 3.2.0-12-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  290.10  Wed Nov 16 17:39:29 PST 2011
 GCC version:  gcc version 4.6.2 (Ubuntu/Linaro 4.6.2-12ubuntu1)
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,imgjpeg,decor,snap,imgpng,place,dbus,session,mousepoll,regex,commands,vpswitch,wall,neg,move,gnomecompat,resize,imgsvg,resizeinfo,text,animation,workarounds,fade,expo,scale,ezoom,unityshell,scaleaddon]
CompositorRunning: compiz
Date: Tue Feb  7 14:43:12 2012
DistUpgraded: Log time: 2012-01-26 16:01:56.788410
DistroCodename: precise
DistroVariant: ubuntu
 NVIDIA Corporation G84 [GeForce 8600M GT] [10de:0407] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Apple Inc. Device [106b:00a0]
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1)
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
MachineType: Apple Inc. MacBookPro3,1
 PATH=(custom, user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-12-generic root=UUID=4b3d81ed-fb5d-4946-97c0-ec537e1bfa3f ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to precise on 2012-01-26 (11 days ago)
 Section "Device"
 	Identifier	"Default Device"
 	Option	"NoLogo"	"True"
dmi.bios.date: 03/05/08
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP31.88Z.0070.B07.0803051658
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Mac-F4238BC8
dmi.board.vendor: Apple Inc.
dmi.board.version: PVT
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 2
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F4238BC8
dmi.modalias: dmi:bvnAppleInc.:bvrMBP31.88Z.0070.B07.0803051658:bd03/05/08:svnAppleInc.:pnMacBookPro3,1:pvr1.0:rvnAppleInc.:rnMac-F4238BC8:rvrPVT:cvnAppleInc.:ct2:cvrMac-F4238BC8:
dmi.product.name: MacBookPro3,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu8
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu4
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.3-0ubuntu10
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

** Affects: compiz (Ubuntu)
     Importance: Medium
     Assignee: Canonical Desktop Experience Team (canonical-dx-team)
         Status: New

** Tags: amd64 apport-bug compiz-0.9 has-workaround precise running-unity single-occurrence ubuntu
Window decorations disappear when enabling/disabling external monitor
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