[Bug 1264887] Re: After upgrade 12.04 -> 14.04 there was no display manager (kdm or lightdm)

[Brian Murray]

Looking at the ubuntu-release-upgrader code we see the following:

        for key in metapkgs:   
            # if it is installed we are done
            if key in self and self[key].is_installed:
                logging.debug("need_server_mode(): run in 'desktop' mode, (because of pkg '%s')" % key)
                return False
            # if it is not installed, but its key depends are installed
            # we are done too (we auto-select the package later)
            deps_found = True
            for pkg in self.config.getlist(key, "KeyDependencies"):
                deps_found &= pkg in self and self[pkg].is_installed

KeyDependencies for kubuntu-desktop are:

[kubuntu-desktop]
KeyDependencies=kdm, kubuntu-artwork

Are there some other packages that should be added?

** Also affects: ubuntu-release-upgrader (Ubuntu Trusty)
   Importance: High
       Status: Confirmed

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https://bugs.launchpad.net/bugs/1264887

Title:
  After upgrade 12.04 -> 14.04 there was no display manager (kdm or
  lightdm)

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Confirmed
Status in “ubuntu-release-upgrader” source package in Trusty:
  Confirmed

Bug description:
  This Kubuntu machine had KDM installed before the upgrade from 12.04
  to 14.04. After the upgrade there was no display manager left, i.e.
  kdm was no longer installed and it wasn't replaced by lightdm like it
  happened on another machine with a fresh Kubuntu 12.04 system.

  The upgrade should either keep KDM or replace it by lightdm, but it
  should not leave the system in a state without display manager.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.209
  ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
  Uname: Linux 3.12.0-7-generic x86_64
  ApportVersion: 2.12.7-0ubuntu3
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Sun Dec 29 22:35:03 2013
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2013-12-29 (0 days ago)
  VarLogDistupgradeTermlog:

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