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

[Nils Kassube]

Obviously the keydependencies have not been found even though kdm was
installed. Or is it required to find both (all) keydependencies? Then
the explanation would be that kubuntu-artwork seems not to be available
from the kubuntu-backports-ppa and therefore wasn't installed.

Would it help if I send a list of the installed packages from before the
upgrade?

I made some more experiments. I used the default installation of Kubuntu
12.04 and then upgraded to the kubuntu-backports-ppa. Then I upgraded to
14.04 and the result was that lightdm was installed, no matter if
kubuntu-desktop was installed or not.

Then I removed the other packages which were not installed on the system
which produced the bug in question. The result of the upgrade to 14.04
was that kdm was removed and lightdm was not installed. I had a closer
look at the packages and found that ubuntu-minimal and ubuntu-standard
were not installed, so I repeated the experiment with these packages
included, but the result stayed the same (no display manager).

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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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