[Bug 67459] New: [SNB] rotation fails after starting X with two monitors

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67459

          Priority: medium
            Bug ID: 67459
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [SNB] rotation fails after starting X with two
                    monitors
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: cancan.feng at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 83188
  --> https://bugs.freedesktop.org/attachment.cgi?id=83188&action=edit
rotation fails dmesg

ystem Environment:
--------------------------------------------
Kernel: (drm-intel-next-queued)fae5cbff3e3e4097de2e76178d462b90626c2bdb
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Sun Jul 21 21:37:09 2013 +0200

    drm/i915: clean up crtc timings computation

Bug detailed description:
--------------------------------------------
With two monitros plugged in(DVI and DP), I started X and then did rotation,
found that X window can rotate successfully on DVI monitor, but DP monitor
turned to black.

Reproduce steps:
--------------------------------------------
1. boot machine with DVI and DP plugged in
1. xinit&
2. xrandr -o right  --> DP turns to black

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