** Description changed: [Impact] + * Inability to use aptitude on multi-arch systems. Any action which + results in a packaging conflict, or otherwise broken package, invokes + the problem resolver which will proceed to remove *all* foreign-arch + packages. + + The packages are removed always, even if they are unrelated to the + problem being resolved. In the usual case, the problem resolver is + unable to find any solution which does not involve removing all foreign- + arch packages. + + * Complete lack of upstream support for aptitude, regardless of whether + any specific issue appears to be related to multi-arch. + + Upstream does not provide any support for aptitude where it is installed on a multi-arch system unless all of these conditions are met: + - it is at least version 0.6.6; and + - attached multiarch-conflicts.patch is applied. + + At this point Ubuntu is 100% provider of support for aptitude on + Oneiric, Precise, and Quantal. + [Fix] + + As attached. Update the problem resolver to be more informed about multi-arch packages and specifically the implicit package relations associated + with them. [Test Case] 1. Enable multiarch (should be automatic on new oneiric systems) 2. Install an i386 package on amd64 (like flashplugin-installer:i386) 3. Mark something with a lot of dependencies for installation 4. On the confirmation screen, try to remove on of the dependencies (aptitude will now fail to perform upgrades when there's a package conflict w/out removing the i386 libs) This renders aptitude painful on a multiarch enabled system (default in oneiric). [Workaround] 1. If you can survive without 32 bit libraries, just comment out the single line in /etc/dpkg/dpkg.cfg.d/multiarch; or 2. Use another package manager (e.g. apt-get, synaptic, or Software Center) 3. Disable the problem resolver by adding this line in /etc/apt/apt.conf: Aptitude::ProblemResolver::StepLimit "0"; [Regression Potential] + * Patch is of moderate size but requires someone with strong APT + knowledge to verify. + + * Some package relations, particularly conflicts and breaks, may be + wrongly ignored and packages not identified as broken by aptitude. This + can leave a system in a broken state and/or result in dpkg errors. + + * Any complex dependency situation is potentially handled incorrectly. + + * Already in Wheezy and Sid, suitable for Quantal. + + ** Do not even consider applying this patch to SRU without it being + first thoroughly inspected by a seasoned APT person. If you have never + looked deep in to the workings of, say, class pkgProblemResolver + (libapt-pkg) or the aptitude problem resolver, then you are probably + underqualified to inspect the patch. ** + [Original Report] ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: aptitude 0.6.4-1ubuntu2 Architecture: amd64
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/831768 Title: aptitude cannot handle conflicts with multiarch enabled To manage notifications about this bug go to: https://bugs.launchpad.net/aptitude/+bug/831768/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
