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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1363384

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1363384

Title:
  CONFIG_DMA_CMA causes performance problems

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  after upgrade to utopic, regular freezes for some seconds to some
  minutes appeared. Using custom kernel compiled from provided source of
  3.16.0-11.16 with CONFIG_DMA_CMA=n solves the problem.

  Linux freezes with up-to-date linux-image from repository (version
  3.16.0-11.16). It doesn't matter, whether I use radeon or vesa driver.

  Discussion about the bug in either X or kernel happened on
  http://lists.freedesktop.org/archives/dri-devel/2014-August/065842.html

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