[Bug 73943] [snb i915] DP Flicker

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73943

--- Comment #7 from Robert N <crshman at gmail.com> ---
(In reply to comment #6)
> Just one out of a pair? The ddx uses (in most circumstances anyway) a single
> fb for both and flips both at the same time. This observation leads me to
> think it is underruns...
The monitors are independent when they blank, here's a video:
http://www.youtube.com/watch?v=7L5vZz-APUM

> Any tool. All that we want to verify is that there is no corruption in the
> root image, so anything that uses XGetImage or DRI2 reads from the
> frontbuffer will be adequate.
Here is the tool I used to test:
http://recordmydesktop.sourceforge.net/about.php

When recording the video the right monitor blanks, but the recording does not.
Which suggests to me that it is a an underrun issue as you described.

http://www.youtube.com/watch?v=hftue_XLusU

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