I just switched to ubuntu 14.10, not having the issue there. but from my
experience hash sum mismatch may mean the data is changed like when
connecting through a proxy. not that it helps.

I think also it's hard to offer free support for every little thing, so if
you can, upgrade to ubuntu 14.10

*Stephan Bayer*

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On Tue, Apr 14, 2015 at 3:09 PM, Günter Grodotzki <
<email address hidden>> wrote:

> This Bug is over six months old - can we get an update on it? I thought
> LTS = Long Term Support?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1373598
>
> Title:
>   apt-get update fails, hash sum mismatches (trusty)
>
> Status in apt package in Ubuntu:
>   Confirmed
> Status in ubuntu-release-upgrader package in Ubuntu:
>   Confirmed
>
> Bug description:
>   1. Release:
>   Description:  Ubuntu 14.04.1 LTS
>   Release:      14.04
>
>   2.  not a package. The whole distro is broken.
>
>   3. I always expect apt-get update to work, at least with Ubuntu's own
>   repositories.
>
>   4. "apt-get update" failed, and later "apt-get dist upgrade"
>
>
>   It started with this when doing a normal "apt-get update"
>
>   W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/trusty-
>   updates/main/source/Sources  Hash Sum mismatch
>
>   W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/trusty-
>   updates/main/binary-amd64/Packages  Hash Sum mismatch
>
>   W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/trusty-
>   updates/universe/binary-i386/Packages  Hash Sum mismatch
>
>   E: Some index files failed to download. They have been ignored, or old
>   ones used instead.
>
>
>   When doing a dist-upgrade, I then got this:
>   E: mkinitramfs failure cpio 141 gzip 1
>   update-initramfs: failed for /boot/initrd.img-3.13.0-36-generic with 1.
>   run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return
> code 1
>   Failed to process /etc/kernel/postinst.d at
> /var/lib/dpkg/info/linux-image-extra-3.13.0-36-generic.postinst line 1025.
>   No apport report written because the error message indicates its a
> followup error from a previous failure.
>
>                                   dpkg: error processing package
> linux-image-extra-3.13.0-36-generic (--configure):
>    subprocess installed post-installation script returned error exit
> status 2
>   dpkg: dependency problems prevent configuration of linux-image-generic:
>    linux-image-generic depends on linux-image-extra-3.13.0-36-generic;
> however:
>     Package linux-image-extra-3.13.0-36-generic is not configured yet.
>
>   dpkg: error processing package linux-image-generic (--configure):
>    dependency problems - leaving unconfigured
>   Setting up linux-headers-3.13.0-36 (3.13.0-36.63) ...
>   Setting up linux-headers-3.13.0-36-generic (3.13.0-36.63) ...
>   Examining /etc/kernel/header_postinst.d.
>   run-parts: executing /etc/kernel/header_postinst.d/dkms
> 3.13.0-36-generic /boot/vmlinuz-3.13.0-36-generic
>   Setting up linux-headers-generic (3.13.0.36.43) ...
>   No apport report written because the error message indicates its a
> followup error from a previous failure.
>
>                                   dpkg: dependency problems prevent
> configuration of linux-generic:
>    linux-generic depends on linux-image-generic (= 3.13.0.36.43); however:
>     Package linux-image-generic is not configured yet.
>
>   dpkg: error processing package linux-generic (--configure):
>    dependency problems - leaving unconfigured
>
>
>   And later this at the end:
>   Processing triggers for libc-bin (2.19-0ubuntu6.3) ...
>   E: Sub-process /usr/bin/dpkg returned an error code (1)
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 14.04
>   Package: ubuntu-release-upgrader-core 1:0.220.5
>   ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4
>   Uname: Linux 3.13.0-34-generic x86_64
>   ApportVersion: 2.14.1-0ubuntu3.4
>   Architecture: amd64
>   CrashDB: ubuntu
>   CurrentDesktop: Unity
>   Date: Wed Sep 24 21:57:55 2014
>   InstallationDate: Installed on 2013-05-09 (503 days ago)
>   InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64
> (20130424)
>   PackageArchitecture: all
>   SourcePackage: ubuntu-release-upgrader
>   Symptom: dist-upgrade
>   UpgradeStatus: Upgraded to trusty on 2014-05-04 (142 days ago)
>   VarLogDistupgradeTermlog:
>
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>