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[Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxx>]

Public bug reported:

[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.

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: High
     Assignee: Maarten Lankhorst (mlankhorst)
         Status: Confirmed


** Tags: trusty utopic vivid

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: New => Confirmed

** Changed in: xserver-xorg-video-intel (Ubuntu)
     Assignee: (unassigned) => Maarten Lankhorst (mlankhorst)

** Changed in: xserver-xorg-video-intel (Ubuntu)
   Importance: Undecided => High

** Tags added: trusty utopic vivid

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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:
  Confirmed

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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