hostname package marked for suppression but is essential

[LeForgeron]

Binary package hint: update-manager

An unresolvable problem occurred while calculating the upgrade:
Le paquet essentiel « hostname » est marqué pour suppression.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

Si rien de ceci ne convient, veuillez signaler ce bogue concernant le paquet « update-manager » en y joignant les fichiers du dossier /var/log/dist-upgrade/.

From apt.log (attached):
Investigating hostname
Package hostname has broken Pré-Dépend on upstart-job
  Considering upstart 19414 as a solution to hostname 5103
  Removing hostname rather than change upstart-job

main.log extract (look at the end):
2010-05-01 11:25:11,736 DEBUG needServerMode(): can not find a desktop meta package or key deps, running in server mode
2010-05-01 11:28:36,718 DEBUG Installing 'xserver-xorg-video-all' (Distro KeepInstalledPkgs rule)
2010-05-01 11:28:40,218 DEBUG Running KeepInstalledSection rules
2010-05-01 11:28:41,873 DEBUG Kernel uname: '2.6.31-21-generic'
2010-05-01 11:28:42,290 DEBUG ./get_kernel_list.sh returns: ['linux-generic', 'linux-image-generic', 'linux-server', 'linux-image-server', 'linux-virtual', 'linux-image-virtual', 'linux-xen', 'linux-image-xen', 'linux-preempt', 'linux-image-preempt', 'linux-rt', 'linux-image-rt']
2010-05-01 11:28:42,290 DEBUG linux-image-generic kernel already installed
2010-05-01 11:28:42,291 DEBUG Upgrading 'linux-image-generic' (Upgrading kernel from base-installer)
2010-05-01 11:28:42,477 DEBUG nvidiaUpdate()
2010-05-01 11:28:42,676 INFO no old nvidia driver installed, installing no new
2010-05-01 11:28:42,677 DEBUG Upgrading 'brasero' (Distro PostUpgradeUpgrade rule)
2010-05-01 11:28:43,780 DEBUG Removing 'libflashsupport' (Distro PostUpgradeRemove rule)
2010-05-01 11:28:43,783 DEBUG Removing 'kvm-source' (Distro PostUpgradeRemove rule)
2010-05-01 11:28:43,783 DEBUG Removing 'gtk-qt-engine' (Distro PostUpgradeRemove rule)
2010-05-01 11:28:43,783 DEBUG Removing 'libparted1.8-12' (Distro PostUpgradeRemove rule)
2010-05-01 11:28:43,827 DEBUG Removing 'usplash' (Distro PostUpgradeRemove rule)
2010-05-01 11:28:43,870 DEBUG Purging 'ltsp-client' (Distro PostUpgradePurge rule)
2010-05-01 11:28:43,921 DEBUG Purging 'ltspfsd' (Distro PostUpgradePurge rule)
2010-05-01 11:28:43,963 DEBUG Purging 'linux-restricted-modules-common' (Distro PostUpgradePurge rule)
2010-05-01 11:28:43,963 DEBUG plugins for condition 'PostDistUpgradeCache' are '[]'
2010-05-01 11:28:43,963 DEBUG plugins for condition 'lucidPostDistUpgradeCache' are '[]'
2010-05-01 11:28:43,964 DEBUG plugins for condition 'from_karmicPostDistUpgradeCache' are '[]'
2010-05-01 11:28:43,964 DEBUG Installing 'ubuntu-minimal' (base meta package keep installed rule)
2010-05-01 11:28:44,526 DEBUG Installing 'ubuntu-standard' (base meta package keep installed rule)
2010-05-01 11:28:45,966 DEBUG The package 'hostname' is marked for removal but it's a ESSENTIAL package
2010-05-01 11:53:22,450 ERROR Dist-upgrade failed: 'Le paquet essentiel « hostname » est marqué pour suppression.'
2010-05-01 11:53:22,450 DEBUG abort called

[LeForgeron (jgrimbert)]

Forget to say: I'm trying to upgrade from 9.10 to 10.4

[Jean-Baptiste Lallement (jibel)]

Thanks for your report.

Could you please attach the file /var/lib/dpkg/status to this report. Thanks.

[Jean-Baptiste Lallement (jibel)]

thanks for the file. setting to confirmed since you provided the required information.

[LeForgeron (jgrimbert)]

This bug can be closed/dismissed.

Upgrade has been done successfully.
On the action that might have helped:
 - removing all external sources (doubtful)
 - removing opera package
 - removing usplash-themes
 - removing x-video-server-all (spelling/name ?) package

[Jean-Baptiste Lallement (jibel)]

Thanks for the update.
I've not seen any duplicate either. This should be specific to your system setup. I'm closing this report then.

Don't hesitate to submit any new bug.