package libgl1-mesa-dri 10.1.3-0ubuntu0.4 failed to install/upgrade: trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri:amd64

[Carlos Puero C.]

I upgraded from 12.04 to 14.04 and the gui doesn't start, I have to pres ctrl alt f1 and type startx

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libgl1-mesa-dri 10.1.3-0ubuntu0.4
ProcVersionSignature: Ubuntu 3.13.0-64.104-generic 3.13.11-ckt26
Uname: Linux 3.13.0-64-generic x86_64
.tmp.unity.support.test.1:

ApportVersion: 2.14.1-0ubuntu3.13
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Sun Sep 20 00:11:32 2015
DistUpgraded: 2015-09-17 16:36:01,273 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
DpkgTerminalLog:
 Preparing to unpack .../libgl1-mesa-dri_10.1.3-0ubuntu0.4_amd64.deb ...
 Unpacking libgl1-mesa-dri:amd64 (10.1.3-0ubuntu0.4) over (10.1.3-0ubuntu0.4) ...
 dpkg: error processing archive /var/cache/apt/archives/libgl1-mesa-dri_10.1.3-0ubuntu0.4_amd64.deb (--unpack):
  trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri:amd64
DuplicateSignature: package:libgl1-mesa-dri:10.1.3-0ubuntu0.4:trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri:amd64
ErrorMessage: trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri:amd64
ExtraDebuggingInterest: I just need to know a workaround
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RS690M [Radeon Xpress 1200/1250/1270] [1002:791f] (prog-if 00 [VGA controller])
   Subsystem: Toshiba America Info Systems Device [1179:ff60]
InstallationDate: Installed on 2012-05-05 (1232 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MachineType: TOSHIBA Satellite A305D
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-64-generic root=UUID=11bd338e-99db-45be-8011-c365b570a7ee ro quiet splash noapic nomodeset vt.handoff=7
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
Renderer: Software
SourcePackage: mesa
Title: package libgl1-mesa-dri 10.1.3-0ubuntu0.4 failed to install/upgrade: trying to overwrite shared '/etc/drirc', which is different from other instances of package libgl1-mesa-dri:amd64
UpgradeStatus: Upgraded to trusty on 2015-09-17 (2 days ago)
dmi.bios.date: 07/07/2008
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: 1.60
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.vendor: ATI Corp.
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvr1.60:bd07/07/2008:svnTOSHIBA:pnSatelliteA305D:pvrPSAH0U-00Q009:rvnATICorp.:rn:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Satellite A305D
dmi.product.version: PSAH0U-00Q009
dmi.sys.vendor: TOSHIBA
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: Sun Sep 20 01:26:15 2015
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.15.1-0ubuntu2.7