[Bug 1309361] [NEW] Kubuntu upgrade from 13.04 to 13.10 failed: "could not calculate the upgrade"

[Brain]

Public bug reported:

Description:    Ubuntu 13.04
Release:        13.04

I was upgrading from 13.04 to 13.10 using the GUI tool provided by KDE, the upgrade started well, but then suddenly reported "Could not calculate the upgrade"
Unfortunately there is not much information provided by the updater. This is what I can see on the screen:
--------------
Upgrading Kubuntu to version 13.10
Preparing to upgrade
Setting new software channels -> failed
Progress bar showing 99%
"Fetching is complete"
--------------
I'm running Lenovo Thinkpad E530 with 64-bit system. There are some additional packages installed on my system, both from additionals PPA and "stand-alone", the most significant I can think of are Darktable and Lotus Notes.
Upgrading my other laptop few days ago went well.

This bug has been reported multiple times, but always closed as
"invalid" or "expired". However it is still appearing.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntu-release-upgrader-core 1:0.192.13
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Uname: Linux 3.8.0-26-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: amd64
CrashDB: ubuntu
Date: Fri Apr 18 08:37:20 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-06-15 (306 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to raring on 2014-04-18 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade raring

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1309361

Title:
  Kubuntu upgrade from 13.04 to 13.10 failed: "could not calculate the
  upgrade"

Status in “ubuntu-release-upgrader” package in Ubuntu:
  New

Bug description:
  Description:    Ubuntu 13.04
  Release:        13.04

  I was upgrading from 13.04 to 13.10 using the GUI tool provided by KDE, the upgrade started well, but then suddenly reported "Could not calculate the upgrade"
  Unfortunately there is not much information provided by the updater. This is what I can see on the screen:
  --------------
  Upgrading Kubuntu to version 13.10
  Preparing to upgrade
  Setting new software channels -> failed
  Progress bar showing 99%
  "Fetching is complete"
  --------------
  I'm running Lenovo Thinkpad E530 with 64-bit system. There are some additional packages installed on my system, both from additionals PPA and "stand-alone", the most significant I can think of are Darktable and Lotus Notes.
  Upgrading my other laptop few days ago went well.

  This bug has been reported multiple times, but always closed as
  "invalid" or "expired". However it is still appearing.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: ubuntu-release-upgrader-core 1:0.192.13
  ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
  Uname: Linux 3.8.0-26-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.5
  Architecture: amd64
  CrashDB: ubuntu
  Date: Fri Apr 18 08:37:20 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-06-15 (306 days ago)
  InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2014-04-18 (0 days ago)
  VarLogDistupgradeTermlog:

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1309361/+subscriptions