package initramfs-tools 0.99ubuntu11 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[Michael Vogt]

Happend during a oneiric->precise upgrade

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: initramfs-tools 0.99ubuntu11
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
Date: Thu Mar 15 16:08:23 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
SourcePackage: initramfs-tools
Title: package initramfs-tools 0.99ubuntu11 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to oneiric on 2012-03-15 (0 days ago)

[Brian Murray (brian-murray)]

Processing triggers for initramfs-tools ...^M
update-initramfs: Generating /boot/initrd.img-3.0.0-16-generic^M
E: /usr/share/initramfs-tools/hooks/casper failed with return 1.^M
update-initramfs: failed for /boot/initrd.img-3.0.0-16-generic with 1.^M
dpkg: error processing initramfs-tools (--configure):^M
 subprocess installed post-installation script returned error exit status 1^M
Errors were encountered while processing:^M
 initramfs-tools^M

It looks like you have the casper package installed on your system, which I think is abnormal.

casper:amd64 (1.287.1, 1.311)