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Bug#4450: dselect package downgrades



> dselect knows about upgrades (packages on the currently available
> medium that are upgrades of currently installed version) and offers
> the user the option of taking advantage of them.  But it doesn't have
> much notion of packages that are available on the current medium but
> are *less* current than the currently installed versions.  dselect
> should make a point of preventing users from inadvertently downgrading
> packages, and (in order to ease their nerves) should, when
> appropriate, make the user aware that this functionality is present.
> 
> The current behavior, with lines like
> 
>  *== Req base     mount        2.5l-1      2.5j-1      Tools for mounting and m
> 
> listed as simply among
> 
>     --- Up to date installed packages ---
> 
> is scary.  It should be under something like
> 
>     --- Super-current installed packages ---
> 
> so the user knows that dselect won't go off downgrading things without
> serious explicit user overrides of default behavior being applied.

The options that dselect invokes dpkg with ensures that the packages
will not be downgraded.  I'm pretty certain there isn't actually a way
to force dselect to do otherwise, I think you need to invoke dpkg
directly to do it.

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