[Bug 848659] Re: Upgrade from natty fails with 64-bit oneiric beta cd

[Tim Frost]

This now appears to be caused by a failed upgrade leaving a reference to
the CD in /etc/apt/sources.list.

My preferred mirror appears to be missing some packages that the upgrade
was trying to fetch.  This caused a failed upgrade last night.  I then
switched mirrors and updated/upgraded natty, using update-manager,
without looking at  /etc/apt/sources.list.

When I re-tried the upgrade after that from the same CD, it aborted.  I
note that after a successful upgrade in a VM,. using the image from
daily-20110920.5, term.log starts with warnings about duplicate
sources.list entries and after the upgrade, the cdrom entry does indeed
have 'main' and 'restricted' duplicated:

# added by the release upgrader
# deb cdrom:[Ubuntu 11.10 _Oneiric Ocelot_ - Beta amd64 (20110920.5)]/ oneiric main main restricted restricted

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https://bugs.launchpad.net/bugs/848659

Title:
  Upgrade from natty fails with 64-bit oneiric beta cd

Status in “update-manager” package in Ubuntu:
  New
Status in “update-manager” source package in Oneiric:
  New

Bug description:
  System is running 64-bit natty.  When I insert a CD burnt from image
  ubuntu-11.10-beta1-alternate-amd64.iso,  the upgrade process runs
  until it is attempting to process the i386 Packages files.  At that
  step, the upgrade process stops with error 'W:Failed to fetch
  cdrom://Ubuntu 11.10 _Oneiric Ocelot_ - Beta amd64
  (20110901)/dists/oneiric/main/binary-i386/Packages  Please use apt-
  cdrom to make this CD-ROM recognized by APT. apt-get update cannot be
  used to add new CD-ROMs'

  I note that the two i386 Packages.gz files are 20 bytes, corresponding
  to a zero-length uncompressed file.

  Contents of /var/log/dist-upgrade attached as a tar archive

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