Public bug reported:
Binary package hint: update-manager
When running sudo update-manager -d from 9.10, error message appears as
follows:
first, here's the terminal dump -
$ sudo update-manager -d
extracting 'lucid.tar.gz'
authenticate 'lucid.tar.gz' against 'lucid.tar.gz.gpg'
tar: Removing
** Attachment added: dist-upgrade.tar.gz
http://launchpadlibrarian.net/46286662/dist-upgrade.tar.gz
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/46285537/Dependencies.txt
--
system upgrade 9.10 -- 10.04 could not calculate upgrade
I removed xubuntu-desktop with apt-get remove xubuntu-desktop and my
system is now upgrading without issue.
--
system upgrade 9.10 -- 10.04 could not calculate upgrade when both
xubuntu-desktop and ubuntu-desktop are installed
https://bugs.launchpad.net/bugs/571743
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