Bug#722211: please make aptitude more clever on resolving dependency problems

2013-09-09 Thread Harald Dunkel
Package: aptitude
Version: 0.6.8.2-1
Severity: wishlist

I am working on Unstable, using Testing as a fallback in
my sources.list.

Its hard to reproduce, but when aptitude asks me to resolve
package conflits it presends an endless flow of complex
package sets to keep and downgrade and to remove, instead
of keeping a single package that can still be found in
testing.

It would be very nice if this could be improved, e.g. by
some algorithm looking for the least painful change and
presenting it first.


Regards
Harri


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Bug#722211: [Aptitude-devel] Bug#722211: please make aptitude more clever on resolving dependency problems

2013-09-09 Thread Axel Beckert
Control: tag -1 + confirmed

Hi Harald,

Harald Dunkel wrote:
 Its hard to reproduce, but when aptitude asks me to resolve
 package conflits it presends an endless flow of complex
 package sets to keep and downgrade and to remove, instead
 of keeping a single package that can still be found in
 testing.

Indeed. Aptitude currently seems to prefer removals and downgrades
over keeps.

You can changed that yourself either with resolver hints (see
http://aptitude.alioth.debian.org/doc/en/ch02s03s05.html) or resolver
costs (see http://aptitude.alioth.debian.org/doc/en/ch02s03s04.html).

 It would be very nice if this could be improved, e.g. by
 some algorithm looking for the least painful change and
 presenting it first.

That'd be nice when running unstable, yes.

Not sure though if it's the best solution during dist-upgrades from
oldstable to stable.

Regards, Axel
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