[Bug 89073] New: [SKL mobile]DP probably fails to be lighted up , plug in after os boot up.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89073

            Bug ID: 89073
           Summary: [SKL mobile]DP probably fails to be lighted up , plug
                    in  after os boot up.
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: lei.a.liu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

==System Environment==
--------------------------
Bios : V68
Regression: No. First test on this platform.
boot with DP or HDMI monitor
Non-working platforms: SKLY

==kernel==
--------------------------
-nightly: b4442ee4e150506cebeee72249efc566c5f14bbe (fails)
     drm-intel-nightly: 2015y-02m-06d-09h-25m-00s UTC integration manifest

==Bug detailed description==
-----------------------------
plug DP after os boot up. DP monitor probably can't be lighted up.

But if boot os up with pluging DP, DP monitor hotplug works well.

==Reproduce steps==
---------------------------- 
1. boot OS up
2. plug DP
3. check DP monitor

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