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

[Dac Chartrand]

Installation completed with a workaround that I will document below.

This bug can be summarized in two parts.

-=-=-

#1) GUI Installer crashed with black screen at start of unpacking phase.
Had to reboot.

Unsolved mystery.

-=-=-

#2) Running `sudo apt-get dist-upgrade` gave an error. Workaround
provided by link in comment #3.

$ sudo nano -w /usr/lib/python2.7/sre_constants.py

Look for:
  from _sre import MAXREPEAT

Replace with:
  MAXREPEAT = 65535
  #from _sre import MAXREPEAT

$ sudo nano -w /usr/lib/python2.7/sre_constants.py
$ nano -w /usr/lib/python2.7/sre_parse.py

Look for:
 from _sre import MAXREPEAT

Replace with:
 #from _sre import MAXREPEAT

-=-=-

Hope this helps someone.

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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 “update-manager” package in Ubuntu:
  New

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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