Workspace animation incorrect with multiple monitors at different resolutions

[Luke Horwell]

There is an issue where the workspace animation zooms to/from the wrong monitor when using multiple monitors at different screen resolutions. This does not happen when the resolutions are the same.

Slowing down the animation with compizmanager makes the inaccurate zoom animation more apparent.

I've attached 2 screenshots which will help visualise the problem.

At the same resolutions, zooming is correct.
At different resolutions, zooming flies in/out on both monitors for the left section only, then cuts to the right section on the right monitor.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-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: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 331.38 Wed Jan 8 19:32:30 PST 2014
 GCC version: gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1)
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Mon Apr 21 21:19:42 2014
DistUpgraded: 2014-04-18 15:59:07,775 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 NVIDIA Corporation GK107 [GeForce GTX 650] [10de:0fc6] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd Device [1458:3555]
InstallationDate: Installed on 2012-12-25 (482 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: Gigabyte Technology Co., Ltd. GA-A55M-DS2
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=28e39428-f49a-4345-92e7-7612cddd6f88 ro quiet splash nomodeset video=uvesafb:mode_option=1920x1080-24,mtrr=3,scroll=ywrap
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to trusty on 2014-04-18 (3 days ago)
dmi.bios.date: 02/29/2012
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F1
dmi.board.name: GA-A55M-DS2
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF1:bd02/29/2012:svnGigabyteTechnologyCo.,Ltd.:pnGA-A55M-DS2:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-A55M-DS2:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-A55M-DS2
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.11+14.04.20140409-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-4ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-4ubuntu5
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Mon Apr 21 21:18:55 2014
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input PIXART USB OPTICAL MOUSE MOUSE, id 8
 input Trust Webcam KEYBOARD, id 9
 input AT Translated Set 2 keyboard KEYBOARD, id 10
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.15.1-0ubuntu2