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[Ryan Tandy <571247@xxxxxxxxxxxxxxxxxx>]

I'm still affected by this. My test case is Ubuntu 12.04.2, 32-bit,
fully up to date as of this morning. As I write this my version of
firefox is 22.0+build2-0ubuntu.12.04.1 and my version of acroread is
9.5.5-1precise1.

When I start Firefox and open a PDF in a tab, Firefox spawns a plugin-
container for nppdf.so, and that in turn spawns an acroread. If I close
the PDF tab and wait a few seconds, acroread exits but is not
immediately reaped, so a defunct (zombie) acroread remains.

If I try to open another PDF in a tab while the zombie is present, all I
get is a black screen.

After a longer time the plugin-container exits, taking the acroread
zombie with it. After that, I can open a PDF normally again, since a new
plugin-container and acroread are created.

Disabling the out-of-process plugins feature in Firefox globally
(dom.ipc.plugins.enabled=false) seems to function as a workaround, but
blacklisting only the nppdf plugin
(dom.ipc.plugins.enabled.nppdf.so=false) still sometimes gives me a
black screen, even though a plugin-container isn't created.

** Changed in: acroread (Ubuntu)
       Status: Incomplete => Confirmed

** Also affects: firefox (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/571247

Title:
  acroread remains zombie, so pdfs won't be rendered anymore

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