Switching windows with 'Ring Switcher' and using a 3x3 workspace array results in faulty switching between windows (window shifted) placed further than 2x2 workspaceses.

[Vidvranjek]

Steps to reproduce the bug:

- In ccsm enable Ring Swither to use alt+tab for 'Next Windpw Key (All Workspace)'. Follow to disable the default key combination in Unity plugin.

- In ccsm's 'General Options' set 'Desktop Size' to 3x3.

- Go to workspace 3,1 (horizontal, vertical; starting from top left) and grab any window by the title bar and drag it to the right edge so it expands to the right half of the workspace.

- Navigate to workspace 1,2 using ctrl+alt+arrow keys and press alt+tab until you see the window you just moved to workspace 3,1

- Release the alt-tab and you will be taken to workspace 1,1 (instead of 3,1) and you will see the right edge of the window on workspace 3,1 that was shifted to the right for approx. 2-3cm for some reason

- Try other combinations

It also appears 14.04

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6
Uname: Linux 3.19.0-30-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.17.2-0ubuntu1.5
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: Fri Oct 16 16:56:15 2015
DistUpgraded: Fresh install
DistroCodename: vivid
DistroVariant: ubuntu
DkmsStatus: bbswitch, 0.7, 3.19.0-30-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:11cd]
   Subsystem: ASUSTeK Computer Inc. Device [1043:11cd]
JournalErrors: Error: command ['journalctl', '-b', '--priority', 'warning'] failed with exit code 1: No journal files were found.
MachineType: ASUSTeK COMPUTER INC. G550JK
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=UUID=9a6cce6e-ddfb-40c7-a64c-823140602164 ro quiet splash acpi_backlight=vendor vt.handoff=7
SourcePackage: compiz
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/11/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: G550JK.204
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: G550JK
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrG550JK.204:bd08/11/2014:svnASUSTeKCOMPUTERINC.:pnG550JK:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnG550JK:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: G550JK
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.60-2
version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2
version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
xserver.bootTime: Sat Oct 10 11:46:59 2015
xserver.configfile: default
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
 NOUVEAU(G0): [GLAMOR] failed to initialise EGL
 NOUVEAU(G0): Error creating GPU channel: -19
 NOUVEAU(G0): Error initialising acceleration. Falling back to NoAccel
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 12876
 vendor SDC
xserver.version: 2:1.17.1-0ubuntu3.1