[Bug 1568284] Re: Reinstall option offered, but does not work for i386 to x86_64 upgrade

[Simon Quigley]

** Changed in: ubiquity (Ubuntu)
       Status: New => Won't Fix

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Title:
  Reinstall option offered, but does not work for i386 to x86_64 upgrade

Status in ubiquity package in Ubuntu:
  Won't Fix

Bug description:
  Today I upgraded a 32-bit Ubuntu 12.04 using ubuntu-16.04-beta2-desktop-amd64.iso on USB via unetbootin.
  Overall, success!  However, along the way I did start over due to a time-consuming delay with a package backup step that appeared to be failing for every single package.  (I looked at the logs going by in the GUI installer)  Wasn't sure if it was due to Ubuntu 12.04, or due to 32-bit to 64-bit, but it appeared to be failing.  So I restarted and chose the reformat-and-install-fresh option for the system partition (other partitions for swap and /home) and it seems to skip this step and breeze on through the installation.  At this point I can't reproduce the issue, since the 12.04 32-bit is gone forever (bye, bye!) but here is a report in case it's helpful. 

  1) The release of Ubuntu you are using, via 'lsb_release -rd' or
  System -> About Ubuntu

  ubuntu-16.04-beta2-desktop-amd64.iso  (GUI installer)

  2) The version of the package you are using, via 'apt-cache policy
  pkgname' or by checking in Software Center

  NA

  3) What you expected to happen

  Backup the system partition somehow and install 16.04.

  4) What happened instead

  It took a long time with what looked like failures to package each thing it came across.
  The "upgrade" from Ubuntu 12.04 32-bit to 16.04 64-bit didn't look it was going to work as intended.
  But I didn't wait and see, I rebooted and installed clean instead.

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