[Bug 69404] [Regression HSW ULT]igt/testdisplay -d 16 cause balckscreen with HDMI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=69404

pengcheng.jiang at intel.com changed:

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

--- Comment #3 from pengcheng.jiang at intel.com ---
> Yes, I think a bisect would be really useful here. Ville discovered hard
> hangs when doing modest on HSW, but this seems to be a different issue. And
> I have no idea what's really going on here ...

I have finished bisect, the result shows:

e6e792092e816bea0797995c886fb057c91d4546 is the first bad commit
commit e6e792092e816bea0797995c886fb057c91d4546
Author: Ville Syrj盲l盲 <ville.syrjala at linux.intel.com>
Date:   Fri May 31 15:23:41 2013 +0300

    drm/edid: Add both 60Hz and 59.94Hz CEA modes to connector's mode list

Sorry for take some time, the amount of the steps is a little large. What's
more, I think the problem may be caused by this mode:
CRTS(3):[12]  1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74250

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