Changing the log in background in ubuntu 14 - source_xorg.py crashed

[Shayan Hakimi]

I was trying to change the log in background of the Ubuntu 14 using the Ubuntu Tweak software., however after restart the background is not changed and when I log in a messy window is shown till the desktop be loaded.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-42.48~14.04.1-generic 3.19.8-ckt10
Uname: Linux 3.19.0-42-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 352.63 Sat Nov 7 21:25:42 PST 2015
 GCC version: gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04)
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,staticswitcher,workarounds,scale,expo,ezoom,dbus]
CurrentDesktop: X-Cinnamon
Date: Fri Jan 1 09:55:06 2016
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DpkgLog:

GraphicsCard:
 NVIDIA Corporation GK208 [GeForce GT 630 Rev. 2] [10de:1284] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:8461]
InstallationDate: Installed on 2015-11-29 (32 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
MachineType: Gigabyte Technology Co., Ltd. Z87M-D3H
PackageArchitecture: all
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-42-generic root=UUID=3836994b-d327-4a2b-afae-63a5bca7aab6 ro quiet splash
SourcePackage: compiz
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/03/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F8
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: Z87M-D3H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF8:bd08/03/2013:svnGigabyteTechnologyCo.,Ltd.:pnZ87M-D3H:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ87M-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: Z87M-D3H
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.60-2~ubuntu14.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri N/A
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core N/A
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A
xserver.bootTime: Thu Dec 31 22:35:28 2015
xserver.configfile: default
xserver.errors: open /dev/fb0: No such file or directory
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.17.1-0ubuntu3.1~trusty1