package fglrx-updates 2:15.200-0ubuntu0.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

just trying to execute normal system update.
This is Thinkpad w500 with hybrid gfx.
normally i switch to the integrated intel gfx in bios before booting ubuntu
(this is a dualboot machine)
 but sonetimes the bios is set to swithable gfx.
It seems to me, that this bug occurs only, when bios set to swithable gfx

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: fglrx-updates 2:15.200-0ubuntu0.3
ProcVersionSignature: Ubuntu 3.13.0-53.89-generic 3.13.11-ckt19
Uname: Linux 3.13.0-53-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.11
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: Sat May 30 11:00:41 2015
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DuplicateSignature: package:fglrx-updates:2:15.200-0ubuntu0.3:subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
GraphicsCard:
 Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:2115]
 Advanced Micro Devices, Inc. [AMD/ATI] RV635/M86 [Mobility Radeon HD 3650] [1002:9591] (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:2126]
InstallationDate: Installed on 2014-10-09 (232 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: LENOVO 40624DG
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-53-generic root=UUID=f4f591cb-fd82-49fb-880f-4677bee1b185 ro quiet splash acpi_osi=Linux vt.handoff=7
SourcePackage: fglrx-installer-updates
Title: package fglrx-updates 2:15.200-0ubuntu0.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/14/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 6FET92WW (3.22 )
dmi.board.name: 40624DG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6FET92WW(3.22):bd12/14/2011:svnLENOVO:pn40624DG:pvrThinkPadW500:rvnLENOVO:rn40624DG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 40624DG
dmi.product.version: ThinkPad W500
dmi.sys.vendor: LENOVO
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 10.1.3-0ubuntu0.4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.4
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2.7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1.6
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Sat May 30 10:56:32 2015
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 16469
 vendor LEN
xserver.version: 2:1.15.1-0ubuntu2.7