Cannot upgrade from 16.10 to 17.04

[Luis Alberto Pabón]

Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done

Calculating the changes

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.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: ubuntu-release-upgrader-core 1:16.10.10
ProcVersionSignature: Ubuntu 4.8.0-46.49-generic 4.8.17
Uname: Linux 4.8.0-46-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Tue Apr 18 10:18:09 2017
InstallationDate: Installed on 2016-03-13 (400 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160307)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to yakkety on 2017-04-18 (0 days ago)

[Luis Alberto Pabón (copong)]

Mark bug as invalid, it was due to oibaf's graphics drivers PPA. After purging, release upgrade goes ahead just fine.

[Oxwivi (oxwivi)]

Why would oibaf or any other PPA cause a hold-up? Doesn't the upgrade process explicitly state that it's disabling third-party sources?

Third party sources disabled

Some third party entries in your sources.list were disabled. You can
re-enable them after the upgrade with the 'software-properties' tool
or your package manager.

To continue please press [ENTER]

Does that mean only non-PPA repos? I think PPAs should be considered to be disabled in that case.

[Luis Alberto Pabón (copong)]

Because disabling these ppas don't remove the packages installed. In this
case, oibaf ppa had newer packages as per version numbering than 17.04 thus
apt being unable to resolve valid dependencies.

On Tue, 30 May 2017, 19:51 Oxwivi, <email address hidden> wrote:

> Why would oibaf or any other PPA cause a hold-up? Doesn't the upgrade
> process explicitly state that it's disabling third-party sources?
>
> Third party sources disabled
>
> Some third party entries in your sources.list were disabled. You can
> re-enable them after the upgrade with the 'software-properties' tool
> or your package manager.
>
> To continue please press [ENTER]
>
> Does that mean only non-PPA repos? I think PPAs should be considered to
> be disabled in that case.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1683702
>
> Title:
> Cannot upgrade from 16.10 to 17.04
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1683702/+subscriptions
>

[Luis Alberto Pabón (copong)]

Because disabling these ppas don't remove the packages installed. In this case, oibaf ppa had newer packages as per version numbering than 17.04 in such a way that apt was unable to resolve valid dependencies.