[Bug 86683] New: [BSW Regression]HDMI screen will goes black when run testdisplay -i

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86683

            Bug ID: 86683
           Summary: [BSW Regression]HDMI screen will goes black when run
                    testdisplay -i
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: li.l.xu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 109981
  --> https://bugs.freedesktop.org/attachment.cgi?id=109981&action=edit
dmesg

Environment:
--------------------------
Platform: BSW
Kernel: (drm-intel-nightly) 2014_11_25 ab4b258a6ea5f58b5cb17131aced8f9a8dd64499

Bug detailed description:
-----------------------------
We boot up the machine with HDMI ,and then run testdisplay -i, screen will goes
black for a while and then light up again. 

Steps:
---------------------------
Boot up with HDMI
./testdisplay -i

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