[Bug 76305] New: [BDW/HSW] System hang after booting with DP and eDP.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76305

          Priority: medium
            Bug ID: 76305
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: jbarnes at virtuousgeek.org
           Summary: [BDW/HSW] System hang after booting with DP and eDP.
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jinxianx.guo at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 95983
  --> https://bugs.freedesktop.org/attachment.cgi?id=95983&action=edit
Booting dmesg

Environment:
-------------------
Platform: BDW/HSW
Kernel:  Jesse's Tree( async) 1fd7958c69c8c7bb9bbd9d48da5a552db367d6ad


Description:
------------------------
With Jesse's person tree,System hang after booting with eDP and DP. only shows
Black screen and unable to response with keyboard event,the same with network. 

If boot only with eDP, the system can work well. But DP unable to be detected
after hot-plug in. 

Steps:
---------------------------
1. Booting the OS by DP and eDP

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