Public bug reported:
Despite Googling and trying everything I could find, persistently fails
to 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.
"
Only Error line in log, the rest are debug messages.
"2018-04-10 21:28:55,829 ERROR Dist-upgrade failed: 'E:Error,
pkgProblemResolver::Resolve generated breaks, this may be caused by held
packages.'"
dpkg --get-selections | grep hold
Shows no held packages.
Have done :
sudo apt dist-upgrade
sudo apt upgrade
sudo apt autoremove
sudo apt clean
Still nothing.
So at a loss, hence reporting.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: ubuntu-release-upgrader-core 1:17.04.10
ProcVersionSignature: Ubuntu 4.10.0-42.46-generic 4.10.17
Uname: Linux 4.10.0-42-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.10
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity:Unity7
Date: Tue Apr 10 18:45:32 2018
InstallationDate: Installed on 2014-05-14 (1426 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to zesty on 2018-04-10 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug dist-upgrade third-party-packages zesty
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https://bugs.launchpad.net/bugs/1762828
Title:
Upgrade failing, unable to determine reason
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