Re: WARNING! New Perl/Perl-base upgrade removes 141 Sid/Unstable packages

[Vincent Lefevre <vincent@vinc17.net>]

On 2016-09-29 10:50:39 +0200, Vincent Lefevre wrote:
> On 2016-09-28 23:05:31 +0200, Sven Hartge wrote:
> > There is an option to tune the resolver. I have got the following in my
> > /etc/apt/apt.conf:
> > 
> > ,----
> > | // tweak Aptitude to not suggest removals as first option
> > | Aptitude::ProblemResolver::SolutionCost "removals";
> > `----
> 
> Unfortunately, it doesn't work:
> 
>   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823928
> 
> and this is wontfix. :(

I wonder whether it could be better to increase the value of
Aptitude::ProblemResolver::Remove-Level.

  Option: Aptitude::ProblemResolver::Remove-Level
  Default: 10000
  Description: The safety cost assigned to actions that remove a
  package. See the section called “Safety costs” for a description
  of safety costs.

But I fear that if Aptitude skips low-cost solution with
SolutionCost "removals", it will also skip them with an
increased Remove-Level (unless the decisions related to
safety cost levels are privileged in the heuristics).

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)