[Bug 1310891] Re: attempting to trigger upgrade from 13.04 (raring) to 13.10 (saucy) claims that No new release found

[Brian Murray]

You can safely remove ~/.cache/update-manager-core/meta-release and it
will be recreated.

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https://bugs.launchpad.net/bugs/1310891

Title:
  attempting to trigger upgrade from 13.04 (raring) to 13.10 (saucy)
  claims that No new release found

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

Bug description:
  I'm unable to trigger upgrade from 13.04 to 13.10 , and there is no
  obvious error that i'm getting:

  I made sure that Prompt is set to normal in /etc/update-manager
  /release-upgrades  (also confirmed in the GUI)

  apt-get update runs successfully and then do-release-upgrade returns:

  No new release found

  I've tried to use the main-servers , I've tried running apt-get
  upgrade , apt-get dist-upgrade, nothing is changing this behavior.

  The GUI software update reports: "the software on this computer is up
  to date"

  Ubuntu basically fails silently to inform me that there are new
  releases, and does not show any issue.

  I'm within a fairly simple network, I'm not behind a caching server
  (unless there is a transparent one at the ISP or so)

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