package libpam-runtime 1.1.1-2ubuntu5.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[novan]

need help

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: libpam-runtime 1.1.1-2ubuntu5.3
ProcVersionSignature: Ubuntu 2.6.32-28.55-generic 2.6.32.27+drm33.12
Uname: Linux 2.6.32-28-generic x86_64
Architecture: amd64
Date: Wed Jul 6 20:22:08 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 10.04.2 LTS "Lucid Lynx" - Release amd64 (20110211.1)
PackageArchitecture: all
SourcePackage: pam
Title: package libpam-runtime 1.1.1-2ubuntu5.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Steve Langasek (vorlon)]

The error in the log is:

Setting up libpam-runtime (1.1.1-2ubuntu5.3) ...
debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
dpkg: error processing libpam-runtime (--configure):
 subprocess installed post-installation script returned error exit status 1

Please post the output of these two commands run from a terminal:

sudo fuser -v /var/cache/debconf/config.dat
pstree