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[Scott Kitterman <ubuntu@xxxxxxxxxxxxx>]

The verification of the Stable Release Update for xserver-xorg-video-
intel has completed successfully and the package has now been released
to -updates.  Subsequently, the Ubuntu Stable Release Updates Team is
being unsubscribed and will not receive messages about this bug report.
In the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1410238

Title:
  Rotating external display with optimus results in corruption

Status in xserver-xorg-video-intel package in Ubuntu:
  Fix Released
Status in xserver-xorg-video-intel source package in Trusty:
  Fix Committed
Status in xserver-xorg-video-intel source package in Utopic:
  Fix Released

Bug description:
  [Impact] 
   * Black screen when attempting to rotating external display in affected configurations.

  [Test Case]
   * Run a system with a internal nvidia card, and 2 displays on the intel card. (Usually LCD screen + external VGA/DVI screen.)
   * Run xrandr --output <external> --rotate left
   * Expect a normal, rotated screen.
   * Bad behavior is a black screen.

  [Regression Potential] 
   * Low, only affects the transformed case in optimus mode, but it will be tested against !optimus config too.

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