Could not calculate the upgrade when updating from 13.10 to 14.04

[Arnold Nijboer]

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.

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the above error i recieve when trying to upgrade from 13.10 to 14.04
it doensn't matter if i try it trough update-manager or throug terminal.

i have no error's in main.log.

and also tryed to disable backboprts and non-canonical sources. doesn't help.

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
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashDB: ubuntu
Date: Sun Apr 20 07:55:41 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-01-01 (473 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-04-20 (0 days ago)
VarLogDistupgradeTermlog:

[Ubuntu Foundations Team Bug Bot (crichton)]

Reviewing the files from your upgrade attempt you seem to have enabled the xorg-edgers-ppa. This will prevent the upgrade as that PPA contains different versions of packages essential to Ubuntu. The page, https://launchpad.net/~xorg-edgers/+archive/ppa, contains details on to how to revert to the official Xorg packages. Thanks.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1069133, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.
[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Arnold Nijboer (email-arnoldnijboer)]

Thanks for the reply.
you could be right i did forget to mention the xorg-edgers-ppa.
i will investigate.
though it should be mentioned that it would be prefered if the error said wich source is prefenting the upgrade.

[Arnold Nijboer (email-arnoldnijboer)]

okey solved it! Thanks.

from the manual:
To revert to official packages, install the ppa-purge package and run "sudo ppa-purge xorg-edgers". Note: This currently has issues in oneiric because ppa-purge there does not work with multiarch. ppa-purge packages from this PPA do purge correctly on precise and newer.