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[Shih-Yuan Lee <1489696@xxxxxxxxxxxxxxxxxx>]

I have verified xorg-server-lts-vivid/2:1.17.1-0ubuntu3.1~trusty1.
The rotation and reflection are disabled for NVIDIA Optimus performance mode.

** Tags removed: verification-needed
** Tags added: verification-done

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https://bugs.launchpad.net/bugs/1489696

Title:
  black screen when enabling rotation on a gpu screen

Status in HWE Next:
  In Progress
Status in xorg-server package in Ubuntu:
  Fix Released
Status in xorg-server-lts-vivid package in Ubuntu:
  Invalid
Status in xorg-server source package in Trusty:
  Invalid
Status in xorg-server-lts-vivid source package in Trusty:
  Fix Committed
Status in xorg-server source package in Vivid:
  Fix Committed
Status in xorg-server-lts-vivid source package in Vivid:
  Invalid

Bug description:
  Running with the proprietary nvidia drivers in an optimus config
  works, but enabling reflection or rotation on the intel screen causes
  a black screen to appear.

  [Impact]
   * Causes a black screen if rotation or reflection is enabled.

  [Test Case]
   * Run xrandr --output SOMEOUTPUT --rotation left
      - Expected: Screen should rotate, or the call should fail.
      - Bad behavior: Succeeds, but causes a black screen.

  [Regression Potential]
   * The affected codepaths have reflection and rotation disabled for gpu screens. Another fix could be fixing reflection/rotation, but that will be more involved and likely require driver fixes.

  [Other Info]
   * This issue is copied from https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1308515 for vivid and wily.

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