I also experience a similar/the same problem for upgrading from 14.04 to
xenial. Indeed I do for several months now, always hoping that the bug would be
fixed one day...
This is what pops up (in the end) when I sudo do-release-upgrade
"
Calculating the changes
Could not determine the upgrade
An unresolvable problem occurred while calculating the upgrade.
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
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
"
and here I am...
/var/log/dist-upgrade/apt.log tells me
"Broken dpkg:amd64 Breaks on software-center [ amd64 ] < 13.10-0ubuntu4.2 > (
gnome ) (< 13.10-0ubuntu9~)
Considering software-center:amd64 -1 as a solution to dpkg:amd64 5881
Added software-center:amd64 to the remove list" followed by a long list of
this kind of broken statements and finally
"Can't install 'xubuntu-core' "
excerpt from /var/log/dist-upgrade/main.log:
2017-02-23 07:27:05,447 DEBUG Comparing 4.4.0-64 with 3.13.0-110
2017-02-23 07:27:05,482 DEBUG metapkg 'xubuntu-desktop' installed but
marked_delete
2017-02-23 07:27:05,482 DEBUG none of the '['ubuntu-desktop',
'kubuntu-desktop', 'xubuntu-core', 'xubuntu-desktop', 'ubuntustudio-desktop',
'mythbuntu-desktop', 'kubuntu-netbook', 'lubuntu-core', 'lubuntu-desktop',
'ubuntu-gnome-desktop', 'ubuntu-mate-core', 'ubuntu-mate-cloudtop',
'ubuntu-mate-desktop']' meta-pkgs installed
2017-02-23 07:27:05,482 DEBUG guessing 'xubuntu-core' as missing meta-pkg
2017-02-23 07:27:05,482 ERROR failed to mark 'xubuntu-core' for install ("The
cache has no package named 'xubuntu-core'")
2017-02-23 07:27:05,507 DEBUG blacklist expr 'xubuntu-desktop' matches
'xubuntu-desktop'
2017-02-23 07:27:05,507 DEBUG The package 'xubuntu-desktop' is marked for
removal but it's in the removal blacklist
2017-02-23 07:27:05,616 ERROR Dist-upgrade failed: 'The package
'xubuntu-desktop' is marked for removal but it is in the removal blacklist.'
2017-02-23 07:27:05,617 DEBUG abort called
I am certainly running xubuntu. And it works, so I suppose that all
necessary packages are installed. Unfortunately, just as for milvang, I
do not understand what I need to do to be able to do the upgrade anyway.
And I am not sure of the consequences if I remove xubuntu-desktop as
proposed by rmjpraakash...
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1510841
Title:
"Could not calculate the upgrade" due to multiple metapackages being
installed
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