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

[Tim Frost]

Doing the natty->oneiric upgrade in a 32-bit VM offers a clue:
the ISO is mounted as '/media/Ubuntu 11.10 i386', rather than as /media/cdrom or /media/cdrom0. main.log shows:
2011-09-24 20:19:34,554 DEBUG AptCdrom.add() called with '/media/Ubuntu 11.10 i386'
2011-09-24 20:19:34,645 INFO ignoring missing '/media/Ubuntu 11.10 i386/dists/oneiric/restricted/debian-installer/binary-i386/Packages'
2011-09-24 20:19:34,658 INFO ignoring missing '/media/Ubuntu 11.10 i386/dists/oneiric/restricted/binary-i386/Packages'
2011-09-24 20:19:34,660 INFO ignoring missing '/media/Ubuntu 11.10 i386/dists/oneiric/main/debian-installer/binary-i386/Packages'
2011-09-24 20:19:34,695 INFO ignoring missing '/media/Ubuntu 11.10 i386/dists/oneiric/main/binary-i386/Packages'
2011-09-24 20:19:34,783 DEBUG AptCdrom.add() returned: True

Also, the upgrade is invoked by 
/usr/bin/python /tmp/distupgrade.IR40Fz/oneiric --cdrom '/media/Ubuntu 11.10 i386'

These all use the name assigned when the ISO was created

On the physical PC, I see differences:
1: The CD is mounted at /media/cdrom0 rather than at '/media/Ubuntu 11.10 amd64'
2:  AptCdrom.add is called with /media/cdrom0
3: The errors reference the disk ID from .disk/info, which is different from the disk name.
4: the upgrade is invoked as /usr/bin/python /tmp/tmp.SKbxzxdtVR/oneiric --cdrom /media/cdrom0


After burning the 64-bit beta2 to a new CDRW disk, I now appear to be succeeding with the upgrade.   This suggests that there was an error with the media, and that  the upgrade wasn't handling that error gracefully.

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

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

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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