[Bug 1014008] [NEW] Distribution-upgrades does not re-enable ppa subscriptions after upgrade

[Launchpad Bug Tracker]

*** This bug is a security vulnerability ***

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Every time I upgrade Ubuntu from one release to another, Ubuntu disables
my subscriptions to software and does at no point re-enable them.
Sometimes I forget this and I don't notice until I realize my favorite
apps no longer gets upgrades. You don't have to be an advanced user to
encounter this problem, it even happens with apps bought in the USC.

Imagine the following scenario: 
1. New Ubuntu user purchases an app in the USC.
2. New Ubuntu user upgrades to a new release and Ubuntu promptly disables upgrades to his/hes app.
3. New Ubuntu user notices  that he doesn't get the updates talked about on the web/friends/news.
4.a New Ubuntu user finds out and re-enable updates.
4.b New Ubuntu user does not find out how this happened but observes that this wouldn't be a problem on Windows/Mac.
4.c New Ubuntu user doesn't have a clue what's going on but is frustrated or exposed to security risks due to unpatched software.
5. New Ubuntu user thinks Ubuntu's behavior is stupid, he/she is frustrated or he/she is exposed to security risks.

Notice how, throughout this scenario, there is no benefit or good
outcome.

This behavior is unnecessary.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: apt 0.8.16~exp12ubuntu10.1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Sat Jun 16 10:48:18 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: apt
UpgradeStatus: Upgraded to precise on 2012-04-26 (50 days ago)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment design precise usability
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Distribution-upgrades does not re-enable ppa subscriptions after upgrade
https://bugs.launchpad.net/bugs/1014008
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