Comment 3 for bug 453454

The relevant part from the VarLogDistupgradeApttermlog.gz is :

Preparing to replace libc6 2.10.1-0ubuntu12 (using .../libc6_2.10.1-0ubuntu15_i386.deb) ...

debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable

dpkg: error processing /var/cache/apt/archives/libc6_2.10.1-0ubuntu15_i386.deb (--unpack):

 subprocess new pre-installation script returned error exit status 1

Errors were encountered while processing:

 /var/cache/apt/archives/libc6_2.10.1-0ubuntu15_i386.deb

dpkg: error processing libc6 (--configure):

 package libc6 is already installed and configured

Errors were encountered while processing:

 libc6

dpkg: regarding .../libc6-i686_2.10.1-0ubuntu15_i386.deb containing libc6-i686, pre-dependency problem:

 libc6-i686 pre-depends on libc6 (= 2.10.1-0ubuntu15)

  libc6 is installed, but is version 2.10.1-0ubuntu12.

dpkg: error processing /var/cache/apt/archives/libc6-i686_2.10.1-0ubuntu15_i386.deb (--unpack):

 pre-dependency problem - not installing libc6-i686