package initramfs-tools 0.98.8ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[snagavallis]

Binary package hint: initramfs-tools

1. Ubuntu 11.04 - Pandaboard Rev A3 - Netbook Version
2. Package initramfs-tools 0.98.8ubuntu3
3. Expected to install correctly during apt-get dist-upgrade.
4. Failed to install.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: initramfs-tools 0.98.8ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-1208.11-omap4 2.6.38.2
Uname: Linux 2.6.38-1208-omap4 armv7l
Architecture: armel
Date: Sat May 28 20:43:12 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 1
PackageArchitecture: all
SourcePackage: initramfs-tools
Title: package initramfs-tools 0.98.8ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[maximilian attems (maks-debian)]

Generating u-boot configuration from /boot/boot.script... done.
umount: /tmp/tmp.Ld0lDOIFIG: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))

u-boot with an unmount error.