[Bug 1101708] Re: do-release-upgrade aborts due to unresolvable "broken" packages

[sampo555]

You seem to have some unsupported experimental graphic drivers installed
from a third party PPA and those packages are breaking your update.

Judging from the information you provided, you've used ppa:oibaf/graphics-drivers in the past. If that's the case, please open terminal and follow these steps to remove those packages from your machine:
1) Install ppa-purge: sudo apt-get install ppa-purge
2) Add graphics-drivers ppa: sudo add-apt-repository ppa:oibaf/graphics-drivers
3) Update package index: sudo apt-get update
4) Purge the PPA: sudo ppa-purge ppa:oibaf/graphics-drivers

Finally restart your computer and see if the upgrade is still failing.

** Changed in: update-manager (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1101708

Title:
  do-release-upgrade aborts due to unresolvable "broken" packages

Status in “update-manager” package in Ubuntu:
  Incomplete

Bug description:
  doing 'do-release-upgrade' results in "An unresolvable problem occurred while calculating the upgrade: 
  E:Unable to correct problems, you have held broken packages."

  
  root at 3xc3l717ud3:/var/log/dist-upgrade# lsb_release -rd
  Description:	Ubuntu 12.04.1 LTS
  Release:	12.04

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager 1:0.156.14.11
  ProcVersionSignature: Ubuntu 3.2.0-36.57-generic 3.2.35
  Uname: Linux 3.2.0-36-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.1
  Architecture: amd64
  Date: Sat Jan 19 10:40:57 2013
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1350814951
   com.ubuntu.update-manager window-height 500
   com.ubuntu.update-manager window-width 600
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2013-01-19 (0 days ago)

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