package install-info 4.13a.dfsg.1-8ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

unable to upgrade or install new software.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: install-info 4.13a.dfsg.1-8ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-36.57~precise1-generic 3.5.7.14
Uname: Linux 3.5.0-36-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
Date: Thu Sep 26 21:05:44 2013
DpkgTerminalLog:
 Setting up install-info (4.13a.dfsg.1-8ubuntu2) ...
 /usr/bin/xmodmap: unable to open display ''
 dpkg: error processing install-info (--configure):
  subprocess installed post-installation script returned error exit status 1
DuplicateSignature: package:install-info:4.13a.dfsg.1-8ubuntu2:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
MarkForUpload: True
SourcePackage: texinfo
Title: package install-info 4.13a.dfsg.1-8ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)