[Bug 1663695] Re: Kubuntu 16.04.1 discover empty after fresh install

[Mario Badr]

Muon did not work.

sudo apt install libappstreamqt1/xenial-proposed did work after
following the EnableProposed on Xenial 16.04.2.

Thanks!

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Title:
  Kubuntu 16.04.1 discover empty after fresh install

Status in appstream package in Ubuntu:
  Fix Released
Status in packagekit package in Ubuntu:
  Invalid
Status in plasma-discover package in Ubuntu:
  Invalid
Status in appstream source package in Xenial:
  Fix Committed
Status in packagekit source package in Xenial:
  Invalid
Status in plasma-discover source package in Xenial:
  Invalid

Bug description:
  [Impact]

   * A previous update made AppStream use modern-style component-ids, thereby breaking the Qt library if it is reading data from the cache and if that data happens to be a desktop-application.
   * This leads to KDE's Discover not displaying applications.
   * The issue was introduced by a patch to the Xenial version of AppStream, and is not present in any other version of the package in Ubuntu, affecting Xenial only.

  [Test Case 1]

   * Update the libappstream-qt package, run Discover: All apps should
  be loaded correctly.

  [Regression Potential]

   * Low, this change affects only the Qt bindings and nothing else. The
  change is also a simple string value change.

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