package fglrx 2:14.501-0ubuntu1 [modified: usr/bin/aticonfig usr/bin/atiode usr/bin/fgl_glxgears usr/bin/fglrxinfo usr/lib/fglrx/libGL.so.1.2 usr/sbin/atieventsd] failed to install/upgrade: subprocess new pre-installation script returned error exit status 1

the last update of fglrx does not install on ubuntu 14.04 64 bits.
I have a AMD 7600 HD and I intalled manually the Omega driver a few months ago.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: fglrx 2:14.501-0ubuntu1 [modified: usr/bin/aticonfig usr/bin/atiode usr/bin/fgl_glxgears usr/bin/fglrxinfo usr/lib/fglrx/libGL.so.1.2 usr/sbin/atieventsd]
ProcVersionSignature: Ubuntu 3.16.0-37.51~14.04.1-generic 3.16.7-ckt9
Uname: Linux 3.16.0-37-generic x86_64
NonfreeKernelModules: fglrx
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.10
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
Date: Tue May 19 09:17:21 2015
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
 fglrx-core, 15.200, 3.16.0-37-generic, x86_64: installed
 vboxhost, 4.3.28, 3.16.0-37-generic, x86_64: installed
DuplicateSignature: package:fglrx:2:14.501-0ubuntu1 [modified: usr/bin/aticonfig usr/bin/atiode usr/bin/fgl_glxgears usr/bin/fglrxinfo usr/lib/fglrx/libGL.so.1.2 usr/sbin/atieventsd]:subprocess new pre-installation script returned error exit status 1
ErrorMessage: subprocess new pre-installation script returned error exit status 1
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1659]
 Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] [1002:6760] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Radeon HD 6490M [103c:1659]
InstallationDate: Installed on 2015-02-28 (80 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: Hewlett-Packard HP Casablanca H510
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-37-generic root=UUID=8f55ec4e-4ab9-470f-ba78-f7df51f66c91 ro quiet splash vt.handoff=7
SourcePackage: fglrx-installer
Title: package fglrx 2:14.501-0ubuntu1 [modified: usr/bin/aticonfig usr/bin/atiode usr/bin/fgl_glxgears usr/bin/fglrxinfo usr/lib/fglrx/libGL.so.1.2 usr/sbin/atieventsd] failed to install/upgrade: subprocess new pre-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/05/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.1B
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1659
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 10.31
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.1B:bd10/05/2011:svnHewlett-Packard:pnHPCasablancaH510:pvr059C100000202100110340000:rvnHewlett-Packard:rn1659:rvr10.31:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Casablanca H510
dmi.product.version: 059C100000202100110340000
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
version.fglrx-installer: fglrx-installer N/A
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.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: Tue May 19 08:14:06 2015
xserver.configfile: /etc/X11/xorg.conf
xserver.errors:
 Screen 1 deleted because of no matching config section.
 AIGLX error: failed to open /usr/X11R6/lib64/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib64/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory]
 AIGLX error: failed to open /usr/lib64/dri/fglrx_dri.so, error[/usr/lib64/dri/fglrx_dri.so: cannot open shared object file: No such file or directory]
 AIGLX error: failed to open /usr/X11R6/lib/modules/dri/fglrx_dri.so, error[/usr/X11R6/lib/modules/dri/fglrx_dri.so: cannot open shared object file: No such file or directory]
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.16.0-1ubuntu1.2~trusty2
xserver.video_driver: fglrx