[Bug 1242592] Re: Cannot upgrade from kubuntu 13.04 to 13.10 it shows "Error could not calculate the upgrade"

[Brian Murray]

Reviewing the files from your upgrade attempt you seem to have enabled
the xorg-edgers-ppa.  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.

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Incomplete => Invalid

** Tags added: ppa xorg-edgers-ppa

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https://bugs.launchpad.net/bugs/1242592

Title:
  Cannot upgrade from kubuntu 13.04 to 13.10 it shows "Error could not
  calculate the upgrade"

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Invalid

Bug description:
  Though Kubuntu 13.10 is released but during upgrade it shows an error
  "Could not calculate the upgrade An unresolvable problem occurred
  while calculating the upgrade. This can be caused by: * Upgrading to
  pre-release version of Ubuntu * Running the current pre-release of
  Ubuntu * Unofficial software packages not provided by Ubuntu If none
  of this applies, then please report this bug using the command
  'ubuntu-bug ubuntu-release-upgrader-code' in a terminal."

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