problems upgrading from 14.04 to 16.04

[Oliver Grawert]

hi,
On Mo, 2016-09-26 at 16:41 +0200, Ralf Mardorf wrote:
> If a release upgrade should work smoothly, then it must be done
> without third party, proposed and other experimental repositories
> enabled or packages installed.
> 
> Most likely there's the need to do what Tom suggested, or to do
> something similar tricky, that hardly could be done automatically.

automatically disabling PPAs and other third party repos is one of the
main purposes of do-release-upgrade/update-manager ;) (see [1] if you
ever want to override this behaviour)

by default all PPAs and unknown repos as well as -proposed get disabled
before the updater does any actions to the system.

ciao
	oli

[1] http://bazaar.launchpad.net/~ubuntu-core-dev/ubuntu/xenial/ubuntu-r
elease-upgrader/xenial/view/head:/DistUpgrade/README#L23
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