falha em atualizar pra ubuntu 14.04

[rodrigo]

quando tento atualizar para o ubuntu 10.4 da essa resposta

Ocorreu um problema durante o cálculo da actualização.

Isto pode ser causado por:
* Estar a actualizar para uma versão de pré-lançamento do Ubuntu
* Já ter a versão de pré-lançamento do Ubuntu actual
* Ter pacotes de software não oficiais, que não são fornecidos pelo
Ubuntu

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.6
ProcVersionSignature: Ubuntu 3.11.0-20.34-generic 3.11.10.6
Uname: Linux 3.11.0-20-generic i686
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: i386
CrashDB: ubuntu
Date: Sun Apr 27 22:51:43 2014
InstallationDate: Installed on 2014-04-10 (17 days ago)
InstallationMedia: It
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-04-28 (0 days ago)

[Seth Arnold (seth-arnold)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.

[Brian Murray (brian-murray)]

Reviewing the files from your upgrade attempt you seem to have enabled a PPA that provides Xorg packages. 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 for the xorg-edgers PPA. Instructions for reverting to official Xorg packages should be similar for the PPA that you have enabled.