[Bug 1472947] Re: update-manager hangs after click on technical description

[Brian Murray]

** Summary changed:

- update-manager hangs after click on techical description
+ update-manager hangs after click on technical description

** Changed in: update-manager (Ubuntu)
   Importance: Undecided => Medium

** Tags added: precise trusty

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https://bugs.launchpad.net/bugs/1472947

Title:
  update-manager hangs after click on technical description

Status in update-manager package in Ubuntu:
  New

Bug description:
  The GUI of update-manager to select updates to install keeps hanging
  for indefinite  time with 100% CPU load (full single CPU core).

  This is happening to me already since the 12.04 LTS times, and the
  behavior is more or less unchanged in 14.04 LTS.

  Steps to reproduce:

  0.  There should be some updates available for update-manager to show the window with the update to be installed.
  1. Click the "Details of updates" to display the list
  2. Expand (for example) "*Ubuntu base" and click on some package in the list.
  3. Click the "Technical description" to show the description.
  4. Click again the "Technical description" to hide the description.
  5. Click on some other package in the list.

  Expected:
  - The update manager reacts to the click and moves focus in the list to another package

  Actual result:
  - The update manager hangs (doesn't react to mouse/keyboard events) for indefinite time with 100% CPU load. Time of the blocking varies: from few seconds to up to a minute probably.

  Just some general toggling of "Details of updates" and "Technical
  details", and clicking on different items in the list would cause the
  weird behavior to occur. (Eventually it would also cause the "Details
  of updates" to either stop showing the details or showing the details
  while making the update-manager window non-resizeable.)

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