[Bug 926172] [NEW] failed to upgrade from 11.04 to 11.10

[jigal]

Public bug reported:

Trying to upgrade from 11.04 to 11.10 consistently returns the following
message:

"
Could not calculate upgrade
An unresolvable problem occurred while calculating the
upgrade: E:Error, pkgProblemResolver::Resolve generated 
breaks, this may be caused by held packages. 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 non 
of this applies, then please....
"

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

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https://bugs.launchpad.net/bugs/926172

Title:
  failed to upgrade from 11.04 to 11.10

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

Bug description:
  Trying to upgrade from 11.04 to 11.10 consistently returns the
  following message:

  "
  Could not calculate upgrade
  An unresolvable problem occurred while calculating the
  upgrade: E:Error, pkgProblemResolver::Resolve generated 
  breaks, this may be caused by held packages. 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 non 
  of this applies, then please....
  "

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