Upgrade from 13.10 to 14.04 failed

[Neeraj Nandakumar]

I ran the command
   sudo do-release-upgrade -d

That resulted in:
...

Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Building data structures... Done

Calculating the changes

Calculating the changes

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

Restoring original system state

Aborting
===============================
Hence I ran:
    ubuntu-bug ubuntu-release-upgrader-core

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.5
ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5
Uname: Linux 3.11.0-19-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashDB: ubuntu
Date: Sun Apr 20 13:16:34 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-02-23 (420 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-04-20 (0 days ago)
VarLogDistupgradeAptlog: Log time: 2014-04-20 13:16:23.533158

[Brian Murray (brian-murray)]

Your log file doesn't contain any useful information as it looks like you interrupted as second attempt to perform the upgrade.

2014-04-20 13:16:23,534 DEBUG running doUpdate() (showErrors=False)
2014-04-20 13:16:25,032 ERROR not handled exception:
Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/apt/progress/text.py", line 219, in stop
    def stop(self):

KeyboardInterrupt

2014-04-20 13:16:25,032 DEBUG enabling apt cron job

Anyway, it looks like you have cinnamon installed which will cause and upgrade failure. See the bug for which yours will be made a duplicate of.