[Bug 887650] Re: Upgrade to older releases

[Nathan Williams]

so in looking at this, it seems that the shell script data/apt-cdrom-
check is responsible (used as helper script) for determining if the
media contains a valid upgrade source, so that seems the correct place
to fix this.

I'm not sure though what the best method to go about that would be.

looking at an 11.10 cd, i see the .disk/info path contains some
version/release information that could be used to make a comparison
agains /etc/lsb-release on the base system, but i'm not sure if older
releases also had the .disk/info on the install media, or if it would be
preferable to carry an array of some md5's of the older media?

i'm going to see about snagging some older ubuntu releases to look at
and see whether .disk/info is even a good option.

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https://bugs.launchpad.net/bugs/887650

Title:
  Upgrade to older releases

Status in “update-notifier” package in Ubuntu:
  Confirmed

Bug description:
  Hello
  Just a little problem, with every livecd inserted it propose to upgrade, although it is a release older than the installed.
  Thanks
  Fabio
  ---
  Ubuntu Bug Squad volunteer triager
  http://wiki.ubuntu.com/BugSquad

  ProblemType: BugDistroRelease: Ubuntu 11.10
  Package: update-notifier 0.117ubuntu3.1
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Tue Nov  8 17:34:46 2011
  ExecutablePath: /usr/bin/update-notifierInstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)SourcePackage: update-notifier
  UpgradeStatus: No upgrade log present (probably fresh install)

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