[Bug 88620] [BSW] testdisplay shows abnormal

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88620

Jeff Zheng <jeff.zheng at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #4 from Jeff Zheng <jeff.zheng at intel.com> ---
After workaround the black screen issue, bisect shows following:

2f82bbdf3d4f1361c3d713c516d8aa390102374d is the first bad commit
commit 2f82bbdf3d4f1361c3d713c516d8aa390102374d
Author: Michel Thierry <michel.thierry at intel.com>
Date:   Mon Dec 15 14:58:00 2014 +0000

    drm/i915: Use true PPGTT in Gen8+ when execlists are enabled

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