tis 2005-12-06 klockan 10:47 -0800 skrev Daniel Burrows: > The option is actually Aptitude::ProblemResolver::PreserveManualScore; > no hyphen. This is contrary to the documentation, which I've now fixed. > The reason that this is not a very strong imperative is that it forces > the program to try *very hard* to preserve the states of manual packages. > This in turn means that it can be difficult to find any solution at all > (indeed, I was able to quickly guide the search to a solution without > setting this; with this option, it ran out of solutions almost right away).
That's certainly a negative side effect... I wasn't expecting that - I was expecting more or less a reordering of solutions. Oh well, I guess it can be hard to predict such algorithms. Anyway, I do think that stability (= actually finding reasonable solutions, even though the desired one is not always the first found) is to prefer over 100% predictability (which is what I wanted :-). > > You could instead set Aptitude::CmdLine::Request-Strictness to a large > value. This just tries to preserve the states of packages listed on the > command-line. It isn't set by default because I feel that the command-line > and the visual interface should have identical behavior. Even this wasn't > enough to make your preferred option come up first, although it was the > third solution I got. Seems like something for me to try then. Thanks for the analysis! /Mikael > > Daniel -- Plus ça change, plus c'est la même chose
