Ubuntu
apt package

hoary -> breezy upgrade problem

Bug #21071 reported by Michael Vogt
6
Affects Status Importance Assigned to Milestone
apt (Ubuntu)
Invalid
Medium
Michael Vogt

Bug Description

When doing a stock hoary install and then doing a apt-get dist-upgrade to breezy
this results in removing ubuntu-desktop:

$ sudo apt-get dist-upgrade
The following packages will be REMOVED:
  [..]
  openoffice.org-thesaurus-en-us postfix-tls ubuntu-desktop xlibmesa-dri
  [..]

This is because the old "ubuntu-desktop" package depends on "readahead".

The new "ubuntu-desktop" package depends on "readahead-list". This package
"Conflicts/Replaces/Provides" "readahead".

Apt can't handle this situation, here is the output of the problemResolver:
[..]
Investigating readahead-list
Package readahead-list has broken dep on readahead
  Considering readahead 0 as a solution to readahead-list 0
  Holding Back readahead-list rather than change readahead
Package ubuntu-desktop has broken dep on readahead-list
  Considering readahead-list 0 as a solution to ubuntu-desktop 0
  Removing ubuntu-desktop rather than change readahead-list
[..]

Aptitude deals with the situation more gracefully by removing "readahead",
installing "readahead-list" and upgrading "ubuntu-desktop".

If we want to support dist-upgrading with apt, we need to do a workaround for
this so that the hoary apt can do the dist-upgrade.

Revision history for this message
Michael Vogt (mvo) wrote :

And here is the solution:

<mdz> mvo: we could revert the rename
<mvo> mdz: ok, that sounds good to me. shall I do that now or after preview?
<mdz> mvo: after

Revision history for this message
Michael Vogt (mvo) wrote :

Just as a additional data-point: synaptic (using libapts dist-upgrade algorithm)
is affected by this problem as well.

Revision history for this message
Tollef Fog Heen (tfheen) wrote :

The readahead-list source package now produces the readahead binary package
(with appropriate Conflicts, Replaces and Provides).
I've adjusted the seeds, but not uploaded the new ubuntu-meta.

Revision history for this message
Michael Vogt (mvo) wrote :

Thanks Tollef,

now that this is worked-around for breezy I set the servity to "normal" but
leave it open because it is still a bug.

Revision history for this message
John Vivirito (gnomefreak) wrote :

Michael is this safe to close as it has been a year or is the bug still there?

Revision history for this message
Rocco Stanzione (trappist) wrote :

Closing this bug due to lack of activity/response and because it's against an end-of-life release.

Changed in apt:
status: Unconfirmed → Rejected
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