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[madbiologist <1445051@xxxxxxxxxxxxxxxxxx>]

** Tags added: vivid

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https://bugs.launchpad.net/bugs/1445051

Title:
  Firefox "use hardware acceleration" causes hangs with fglrx

Status in firefox package in Ubuntu:
  New

Bug description:
  ( Maybe this should just be a tip that is added directly to the
  https://wiki.ubuntu.com/MozillaTeam/Bugs page, but if there's a way
  for a regular Ubuntu Launchpad user to edit that page I could not see
  it.)

  I installed fglrx on my desktop for my AMD Radeon HD 5770 card so I
  could use Steam on Ubuntu 15.04 (beta).  Afterwards, Firefox
  performance degraded significantly and there were frequent pauses and
  hangs when switching tabs and opening new pages.   I disabled or
  removed all plugins, and the problem persisted.  I started following
  the directions at https://support.mozilla.org/en-US/kb/firefox-hangs-
  or-not-responding  in order, and when I followed the directions in the
  section "Turn off hardware acceleration" that fixed it.

  If anyone would like for me to turn the hardware acceleration back on
  and try to capture a stacktrace during the hang with Sysprof (as is
  described on the MozillaTeam/Bugs pages above), please just let me
  know.

  Thanks.

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