[Bug 969729] [NEW] 11.10 can't upgrade to 12.04 beta2

[henry_cui]

Public bug reported:

An unresolvable problem occurred while calculating the upgrade:
E:无法修正错误，因为您要求某些软件包保持现状，就是它们破坏了软件包间的依赖关系。

 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

很可能发生了一个传输问题，请稍后重试。

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: update-manager 1:0.156.2
ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22
Uname: Linux 3.0.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sat Mar 31 09:26:04 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: Upgraded to oneiric on 2012-03-31 (0 days ago)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric

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https://bugs.launchpad.net/bugs/969729

Title:
  11.10 can't upgrade to 12.04 beta2

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

Bug description:
  An unresolvable problem occurred while calculating the upgrade:
  E:无法修正错误，因为您要求某些软件包保持现状，就是它们破坏了软件包间的依赖关系。

   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

  很可能发生了一个传输问题，请稍后重试。

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: update-manager 1:0.156.2
  ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22
  Uname: Linux 3.0.0-17-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Sat Mar 31 09:26:04 2012
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to oneiric on 2012-03-31 (0 days ago)

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