Unity is not loading after system update in Ubuntu 13.04

[Simplehuman]

Unity is not loading after system update 18 April 2013 in Ubuntu 13.04 .

It is not working with proprietary and open source drivers and with older kernels too.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: unity 7.0.0daily13.04.15-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,vpswitch,grid,compiztoolbox,obs,mousepoll,gnomecompat,wall,imgpng,regex,move,place,resize,commands,wobbly,unitymtgrabhandles,animation,session,workarounds,fade,expo,scale,ezoom,unityshell]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Thu Apr 18 11:24:05 2013
DistUpgraded: Fresh install
DistroCodename: raring
DistroVariant: ubuntu
GraphicsCard:
 NVIDIA Corporation GT200b [GeForce GTX 285] [10de:05e3] (rev a1) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:82d9]
InstallationDate: Installed on 2013-03-01 (47 days ago)
InstallationMedia: 13.04 13.04 - Release amd64
MachineType: System manufacturer P5K/EPU
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=07ebe19c-5a33-4c17-8554-ae99054ac63e ro noresume ipv6.disable=1
SourcePackage: unity
UnitySupportTest:
 Error: command ['/usr/lib/nux/unity_support_test', '-p', '-f'] failed with exit code 5: Xlib: extension "GLX" missing on display ":0.0".
 Error: GLX is not available on the system
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/19/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0604
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5K/EPU
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0604:bd06/19/2008:svnSystemmanufacturer:pnP5K/EPU:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5K/EPU:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5K/EPU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.9~daily13.04.15-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.43-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.1-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.1-0ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu3
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
xserver.bootTime: Thu Apr 18 11:23:40 2013
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Microsoft Microsoft 5-Button Mouse with IntelliEye(TM) MOUSE, id 8
 input LITEON Technology USB Multimedia Keyboard KEYBOARD, id 9
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.13.3-0ubuntu6

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Christopher Townsend (townsend)]

This looks to be yet another duplicate of bug #1166765.