[Bug 67513] New: [SNB] two monitors each show half of screen with extend mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67513

          Priority: medium
            Bug ID: 67513
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [SNB] two monitors each show half of screen with
                    extend mode
        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 83250
  --> https://bugs.freedesktop.org/attachment.cgi?id=83250&action=edit
System boot messages

System 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), extend mode displays wrong under
gnome-session. Two monitors can only show half screen, the other screen shows
black. I will attach the pictures I got by using scrot and camera. 

Reproduce steps:
--------------------------------------------
1. plug in DVI and DP
2. xinit&
3. gnome-session&
4. xrandr --output HDMI3 --left-of DP2

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