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[Launchpad Bug Tracker <1072136@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package update-manager - 1:18.04.11.6

---------------
update-manager (1:18.04.11.6) bionic; urgency=medium

  * Keep or delete packages after looping over all of them.
    This prevents the resolver from changing the packages in the loop resulting
    in not keeping some phased packages back from being upgraded. (LP: #1072136)
  * Stop lazy import of InstallBackends.
    Lazy imports made update-manager crash when an update-manager
    update changed the backend API and an updated incompatible backend
    was loaded to the not updated running update-manager process. (LP: #1795898)
  * Cancel transaction on exit only when Cancel button is active.
    Also ignore exception when cancellation fails. (LP: #1790670)

 -- Balint Reczey <rbalint@xxxxxxxxxx>  Thu, 04 Oct 2018 21:33:57 +0200

** Changed in: update-manager (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1072136

Title:
  [FFe] After doing updates, update manager propose to install an empty
  list of updates

Status in update-manager package in Ubuntu:
  Fix Released
Status in update-manager source package in Xenial:
  Confirmed
Status in update-manager source package in Bionic:
  Fix Released

Bug description:
  [Impact]

  An empty list of updates is shown to the user when phased updates
  depending on each other are kept back from installation.

  The blank list confuses users.

  [Test Case]

  1. Start with a fully upgraded system and downgrade a few phased interdependent packages to let u-m upgrade them:
  (bionic)$ sudo eatmydata apt install -y --allow-downgrades gnome-software=3.28.1-0ubuntu4 gnome-software-common=3.28.1-0ubuntu4
  (xenial)$ sudo apt install gnome-software=3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2 gnome-software-common=3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2 ubuntu-software=3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2
  $ sudo eatmydata apt install -y --allow-downgrades linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic; sudo /etc/kernel/postinst.d/apt-auto-removal ; sudo apt-mark auto linux-headers-4.15.0-32  linux-headers-4.15.0-32-generic
  3. Set phasing to 0%:
  $ sudo sed -i 's/Phased-Update-Percentage: .*/Phased-Update-Percentage: 0/' /var/lib/apt/lists/*.archive.ubuntu.com_ubuntu_dists_*-updates_main_binary-amd64_Packages 

  2. Start u-m with:
   $ update-manager --no-update

  4. Observe installable updates or u-m telling that there are no
  updates to install in the fixed version or a blank list with unfixed
  u-m.

  [Regression Potential]

  Implementation mistakes could make phased updates installed of
  autoremovable kernels not to be removed but in my testing I found not
  such problem.

  [Original Bug Text]

  In the update dialog, there is no updates, just an empty list, see the
  attached screenhot. Clicking install now-button just takes me back to
  the dialog after some time.

  This problem started after some updates to update-manager to Quantal.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: update-manager 1:0.174.3
  Uname: Linux 3.7.0-030700rc1-generic i686
  ApportVersion: 2.6.1-0ubuntu6
  Aptdaemon:
   Oct 27 18:45:26 marius-T1005 AptDaemon.Worker: INFO: Finished transaction /org/debian/apt/transaction/f6cfb52c39784feb9427cff710a6b22c
   Oct 27 18:50:46 marius-T1005 AptDaemon: INFO: Quitting due to inactivity
   Oct 27 18:50:46 marius-T1005 AptDaemon: INFO: Quitting was requested
  Architecture: i386
  Date: Sat Oct 27 18:50:31 2012
  EcryptfsInUse: Yes
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-time' b'1351354931'
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-height' b'678'
   b'com.ubuntu.update-manager' b'window-width' b'1364'
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to quantal on 2012-08-31 (57 days ago)

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