package update-manager-core 1:0.150.5.2 failed to install/upgrade: failed to stat (dereference) existing symlink `/usr/lib/python2.6/dist-packages/DistUpgrade/DistUpgradeCache.py': Input/output error

[Richard Sparks]

Running mythbuntu distribution.

apt-get -f instsall did not fix the problem

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: update-manager-core 1:0.150.5.2
ProcVersionSignature: Ubuntu 2.6.38-15.60-generic 2.6.38.8
Uname: Linux 2.6.38-15-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat Jun 16 09:07:25 2012
ErrorMessage: failed to stat (dereference) existing symlink `/usr/lib/python2.6/dist-packages/DistUpgrade/DistUpgradeCache.py': Input/output error
GConfNonDefault: /apps/update-manager/check_new_release_ignore=
InstallationMedia: Mythbuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
SourcePackage: update-manager
Title: package update-manager-core 1:0.150.5.2 failed to install/upgrade: failed to stat (dereference) existing symlink `/usr/lib/python2.6/dist-packages/DistUpgrade/DistUpgradeCache.py': Input/output error
UpgradeStatus: Upgraded to natty on 2011-05-12 (400 days ago)

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that there was an error on your system when trying to install a particular package. Please execute the following command, as it will clear your package cache, in a terminal:

sudo apt-get clean

Then try performing the update again. This will likely resolve your issue, but the failure can be caused by filesystem or memory corruption. So please also run a fsck on your filesystem(s) and a memory test. If this does not resolve your bug please set its status back to New. Thanks in advance!