Upgrading gutsy to hardy with aptitude

[Mario Vukelic]

On Tue, 2008-04-29 at 19:15 +1000, Cameron Hutchison wrote:
> However, the recommended method is to use update-manager since it may
> perform some other actions to make the upgrade smooth. Is there
> anywhere that these actions are listed? I would like to know what
> update-manager will do that aptitude wont so that I can look out for
> the issues those actions address.

I would like such a list myself, for informational purposes. I have
recently seen some rudimentary docs about this, but can't find them
right now. From the top of my head, update-manager does the following:
      * Disable third-party repos
      * Make sure ubuntu-desktop is installed
      * Perform the package upgrades
      * Try to minimize the number of configuration file prompts
      * Put users into required new groups

Maybe someone more knowledgeable can chip in ...