[Bug 89401] New: [BYT]Some testdisplay case cause screen flicker on testing branch.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89401

            Bug ID: 89401
           Summary: [BYT]Some testdisplay case cause screen flicker on
                    testing branch.
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: hengx.ding at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 113933
  --> https://bugs.freedesktop.org/attachment.cgi?id=113933&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, this issue have about 1/3 change to  reproduce, I'm not
sure whether this issue exists before. 
no-working platforms: BYT

==kernel==
--------------------------
drm-intel-testting/820fa21889d702c70c82e30342154624c7139bb3(2015-02-28)


==Bug detailed description==
-----------------------------
Run the command below, sreen sometimes will start to flicker.
./testdisplay -p 100,100,0,0,100,100

==Reproduce steps==
---------------------------- 
1. ./testdisplay -p 100,100,0,0,100,100

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