Public bug reported:
"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"
None of this applies. I *did* have unofficial software packages when I
first got this error, but I removed all of them, I believe (removed
everything under "Obsolete ... Packages" in aptitude). Still getting the
error.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.17
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: LXDE
Date: Sat Nov 12 20:12:11 2016
InstallationDate: Installed on 2016-02-21 (265 days ago)
InstallationMedia: Lubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2016-11-13 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2016-08-21T21:46:34.658796
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade xenial
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https://bugs.launchpad.net/bugs/1641373
Title:
"An unresolvable problem occurred while calculating the upgrade" to
Yakkety
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