package libgl1-mesa-dri-lts-raring 9.1.4-0ubuntu0.1~precise1 failed to install/upgrade: conffile './etc/drirc' is not in sync with other instances of the same package

[sebastian]

X server failed to start after updating Hardware Enablement Stack from 12.04.2 to 12.04.3

I was upgrading with this comand:

sudo apt-get install -V libglapi-mesa-lts-raring libgl1-mesa-glx-lts-raring xserver-xorg-lts-raring xserver-xorg-input-all-lts-raring xserver-xorg-video-all-lts-raring libgl1-mesa-dri-lts-raring x11-xserver-utils-lts-raring libglapi-mesa-lts-raring:i386 libgl1-mesa-dri-lts-raring:i386 libgl1-mesa-glx-lts-raring:i386

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libgl1-mesa-dri-lts-raring 9.1.4-0ubuntu0.1~precise1
ProcVersionSignature: Ubuntu 3.8.0-30.44~precise1-generic 3.8.13.6
Uname: Linux 3.8.0-30-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.4
Architecture: amd64
Date: Wed Sep 11 12:50:26 2013
DpkgTerminalLog:
 Przygotowanie do zastąpienia libgl1-mesa-dri-lts-raring 9.1.4-0ubuntu0.1~precise1 (wykorzystując .../libgl1-mesa-dri-lts-raring_9.1.4-0ubuntu0.1~precise1_amd64.deb) ...
 Rozpakowanie pakietu zastępującego libgl1-mesa-dri-lts-raring ...
 dpkg: błąd przetwarzania /var/cache/apt/archives/libgl1-mesa-dri-lts-raring_9.1.4-0ubuntu0.1~precise1_amd64.deb (--unpack):
  conffile './etc/drirc' is not in sync with other instances of the same package
DuplicateSignature: package:libgl1-mesa-dri-lts-raring:9.1.4-0ubuntu0.1~precise1:conffile './etc/drirc' is not in sync with other instances of the same package
ErrorMessage: conffile './etc/drirc' is not in sync with other instances of the same package
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MarkForUpload: True
SourcePackage: mesa-lts-raring
Title: package libgl1-mesa-dri-lts-raring 9.1.4-0ubuntu0.1~precise1 failed to install/upgrade: conffile './etc/drirc' is not in sync with other instances of the same package
UpgradeStatus: No upgrade log present (probably fresh install)