[Bug 76153] New: [HSW-M Regression]multiple small screen shows while running testdisplay -f

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76153

          Priority: medium
            Bug ID: 76153
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW-M Regression]multiple small screen shows while
                    running testdisplay -f
        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: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 95770
  --> https://bugs.freedesktop.org/attachment.cgi?id=95770&action=edit
dmesg

system Environment:
--------------------------
platform: BDW HSW IVB 
Kernel:    (drm-intel-next-queued) b2040f6fed736ccd2319768bc59833abe74148b8

Bug detailed description:
-------------------------
multiple small screen shows while running testdisplay -f, please check the
attachment for details.

It's a regression bug, but we can not find good point.

Reproduce steps:
--------------------
1. ./testdisplay -f 63.50,1024,1072,1176,1328,768,771,775,798
or ./testdisplay -f 38.25,800,832,912,1024,600,603,607,624

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