[Bug 430197] Re: Disable partial upgrades during a development release

[Colin Watson]

I doubt it's sufficient.  It's a step on the way, but I am reasonably
sure there will be a significant number of other cases not yet handled.
My understanding is that disabling partial upgrades prematurely will
have an effect roughly equivalent to forcing people to semantics along
the lines of 'apt-get upgrade', including forever forgetting about new
Recommends, so - even though the dialog is horrible - I can't advise
making this change yet.

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https://bugs.launchpad.net/bugs/430197

Title:
  Disable partial upgrades during a development release

Status in “update-manager” package in Ubuntu:
  Triaged

Bug description:
  More and more people test devel release of Ubuntu. While we give
  adequate warnings on the risks of running ubuntu+1 releases sometimes
  it's not enough.

  update-manager has a concept of a "partial upgrade" which seems to be
  more trouble than it's worth. Perhaps give the user a more descriptive
  set of options, something like:

  a) Wait until later until the archive works itself out.
  b) Install stuff, but don't remove anything
  c) Do a partial upgrade (and perhaps a scary warning like apt does when you try to remove glibc. "Yes, I recognize that I could explode my machine, do it."

  Or perhaps something like "Something bad has happened, go use apt-get"
  or something that makes it clear that update-manager is confused.

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