Thank you Robert. I changed the mirror and it went fine.
On 8 Sep 2011 10:41, "Robert Roth" <email address hidden> wrote:
> ** Description changed:
>
> Some mirrors listed on https://launchpad.net/ubuntu/+archivemirrors are
> not recognized as valid mirrors, thus the dist-upgrade fails, when using
> them, and displays a message about essential packages can not be found
> (ubuntu-desktop or ubuntu-minimal)
>
> The mirrors reporting these issues:
> * Boston University Linux Users Group (www.lug.bu.edu)
> * University of Canterbury (ucmirror.canterbury.ac.nz)
> * Retrosnub Internet Services (ubuntu.retrosnub.co.uk)
> * ihug (mirror.ihug.co.nz)
> * University of Mannheim (mirror.informatik.uni-mannheim.de)
> * RM Education (mirror01.th.ifl.net)
> + * FDCServers.net LLC (76.73.4.58)
>
> The message is:
> "Invalid package information
>
> After your package information was updated the essential package
'ubuntu-minimal' can not be found anymore.
> This indicates a serious error, please report this bug using the command
'ubuntu-bug update-manager' in a terminal and include the files in
/var/log/dist-upgrade/ in the bug report."
>
> ProblemType: Bug
> DistroRelease: Ubuntu 11.04
> Package: update-manager 1:0.150.3
> ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
> Uname: Linux 2.6.38-11-generic x86_64
> Architecture: amd64
> Date: Thu Sep 1 08:48:24 2011
>
> GConfNonDefault:
>  /apps/update-manager/check_new_release_ignore=
>  /apps/update-manager/first_run=false
>  /apps/update-manager/show_details=true
>  /apps/update-manager/window_size=(600,600)
> PackageArchitecture: all
> ProcEnviron:
>  LANGUAGE=en_US:en
>  LANG=en_US.UTF-8
>  SHELL=/bin/bash
> SourcePackage: update-manager
> UpgradeStatus: Upgraded to natty on 2011-09-01 (0 days ago)
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (843729).
> https://bugs.launchpad.net/bugs/838787
>
> Title:
> Archive mirrors not recognized as a valid mirror
>
> Status in “update-manager” package in Ubuntu:
> Triaged
>
> Bug description:
> Some mirrors listed on https://launchpad.net/ubuntu/+archivemirrors
> are not recognized as valid mirrors, thus the dist-upgrade fails, when
> using them, and displays a message about essential packages can not be
> found (ubuntu-desktop or ubuntu-minimal)
>
> The mirrors reporting these issues:
> * Boston University Linux Users Group (www.lug.bu.edu)
> * University of Canterbury (ucmirror.canterbury.ac.nz)
> * Retrosnub Internet Services (ubuntu.retrosnub.co.uk)
> * ihug (mirror.ihug.co.nz)
> * University of Mannheim (mirror.informatik.uni-mannheim.de)
> * RM Education (mirror01.th.ifl.net)
> * FDCServers.net LLC (76.73.4.58)
>
> The message is:
> "Invalid package information
>
> After your package information was updated the essential package
'ubuntu-minimal' can not be found anymore.
> This indicates a serious error, please report this bug using the command
'ubuntu-bug update-manager' in a terminal and include the files in
/var/log/dist-upgrade/ in the bug report."
>
> ProblemType: Bug
> DistroRelease: Ubuntu 11.04
> Package: update-manager 1:0.150.3
> ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
> Uname: Linux 2.6.38-11-generic x86_64
> Architecture: amd64
> Date: Thu Sep 1 08:48:24 2011
>
> GConfNonDefault:
>  /apps/update-manager/check_new_release_ignore=
>  /apps/update-manager/first_run=false
>  /apps/update-manager/show_details=true
>  /apps/update-manager/window_size=(600,600)
> PackageArchitecture: all
> ProcEnviron:
>  LANGUAGE=en_US:en
>  LANG=en_US.UTF-8
>  SHELL=/bin/bash
> SourcePackage: update-manager
> UpgradeStatus: Upgraded to natty on 2011-09-01 (0 days ago)
>
> To manage notifications about this bug go to:
>
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/838787/+subscriptions