[Bug 834261] Re: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'

[Rocko]

/var/log/dist-upgrade/apt.log reports a number of broken packages when I
try to upgrade, eg compiz and unity (which have been installed from
natty-updates or natty-proposed).

** Attachment added: "apt.log"
   https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/834261/+attachment/2550418/+files/apt.log

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https://bugs.launchpad.net/bugs/834261

Title:
  'E:Error, pkgProblemResolver::Resolve generated breaks, this may be
  caused by held packages.'

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

Bug description:
  When I start update-manager after upgrading today, I get the following
  message:

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  Please report this bug against the 'update-manager' package and include the following error message:
  'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'

  And the list of available packages is blank, but the window says I can
  upgrade 45 packages (same with the launcher icon).

  An 'apt-get upgrade' works as expected however.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: update-manager 1:0.152.16
  ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
  Uname: Linux 3.0.0-9-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Thu Aug 25 20:52:03 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  PackageArchitecture: all
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to oneiric on 2011-08-21 (4 days ago)

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