package fglrx (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 1

[Mirzet Kadic]

I tryed to remove the installed fglrx-driver by following this how-to: http://wiki.ubuntuusers.de/grafikkarten/ati/fglrx/Manuelle_Treiberinstallation

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: fglrx (not installed)
ProcVersionSignature: Ubuntu 3.2.0-19.31-generic 3.2.12
Uname: Linux 3.2.0-19-generic x86_64
NonfreeKernelModules: fglrx
.tmp.unity.support.test.0:

ApportVersion: 1.94.1-0ubuntu2
AptOrdering: fglrx: Purge
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Thu Mar 22 00:57:47 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 fglrx-updates, 8.911, 3.2.0-19-generic, x86_64: installed
 virtualbox, 4.1.10, 3.2.0-19-generic, x86_64: installed
ErrorMessage: subprocess installed post-removal script returned error exit status 1
GraphicsCard:
 Advanced Micro Devices [AMD] nee ATI RV770 [Radeon HD 4870] [1002:9440] (prog-if 00 [VGA controller])
   Subsystem: Hightech Information System Ltd. Device [1787:2267]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120306)
JockeyStatus:
 xorg:fglrx_updates - ATI/AMD proprietary FGLRX graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
 xorg:fglrx - ATI/AMD proprietary FGLRX graphics driver (Proprietary, Disabled, Not in use)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-19-generic root=UUID=b4566d21-c15a-4403-96cf-b5f9b99b8546 ro quiet splash vt.handoff=7
SourcePackage: fglrx-installer
Title: package fglrx (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 1
UnitySupportTest: Error: command ['/usr/lib/nux/unity_support_test', '-p', '-f'] failed with exit code 127: /usr/lib/nux/unity_support_test: error while loading shared libraries: libGL.so.1: cannot open shared object file: No such file or directory
UpgradeStatus: Upgraded to precise on 2012-03-10 (11 days ago)
dmi.bios.date: 07/15/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0636
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5B-E Plus
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.:bvr0636:bd07/15/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B-EPlus:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.7.0+bzr3035-0ubuntu1
version.fglrx-installer: fglrx-installer N/A
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
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 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2