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[Shih-Yuan Lee <1308515@xxxxxxxxxxxxxxxxxx>]

This issue doesn't exist on Ubuntu 14.10.
Please help to enable the rotation options on Ubuntu 14.10.

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https://bugs.launchpad.net/bugs/1308515

Title:
  black screen when enabling rotation on a gpu screen

Status in HWE Next Project:
  Triaged
Status in OEM Priority Project:
  Fix Released
Status in X.Org X server:
  New
Status in “xorg-server” package in Ubuntu:
  Fix Released
Status in “xorg-server-lts-saucy” package in Ubuntu:
  Invalid
Status in “xorg-server-lts-saucy” source package in Precise:
  Fix Released
Status in “xorg-server” source package in Saucy:
  Fix Released
Status in “xorg-server” source package in Trusty:
  Fix Released

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]
   * N/A

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