[Bug 1165281] Re: 12.10 to 13.04 Failed, Now Get "An upgrade from raring to quantal is not supported with this tool"

[Brian Murray]

This probably due to lsb_release returning raring, since that part of
the upgrade completed, and the Source From in DistUpgrade.cfg being
"quantal".  I think the only thing to do here is to return a better
error message if release == self.toDist indicating how one may resolve
the situation.

>From DistUpgradeController.py:

    def prepare(self):
        """ initial cache opening, sanity checking, network checking """
        # first check if that is a good upgrade
        self.release = release = subprocess.Popen(["lsb_release","-c","-s"],
                                   stdout=subprocess.PIPE,
                                   universal_newlines=True).communicate()[0].strip()
        logging.debug("lsb-release: '%s'" % release)
        if not (release == self.fromDist or release == self.toDist):
            logging.error("Bad upgrade: '%s' != '%s' " % (release, self.fromDist))
            self._view.error(_("Can not upgrade"),
                             _("An upgrade from '%s' to '%s' is not "
                               "supported with this tool." % (release, self.toDist)))
            sys.exit(1)


** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Triaged

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1165281

Title:
  12.10 to 13.04  Failed, Now Get "An upgrade from raring to quantal is
  not supported with this tool"

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

Bug description:
  Lenovo X220, Ubuntu 12.10

  The screen went black during the upgrade to 13.04.

  The last thing I experienced was a black screen with a really loud
  fan. CTRL+ALT+F2 did nothing. The last thing I saw was "Unpacking Deja
  Vu TTF" then poof, blackness.

  I had to reboot. I landed in what appears to be the old system.

  When I try running `update-manager -d` again, I get the option to
  Partial Upgrade. I click it.

  It says: "An upgrade from raring to quantal is not supported with this
  tool"

  If I instead click Continue, I get a list with a thousand packages.
  Some of which aren't selected. I haven't dared to go beyond that.

  What just happened? How do I fix things?

  Regards,

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