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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [snb i915] DP Flicker"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73943#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [snb i915] DP Flicker"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73943">bug 73943</a>
from <span class="vcard"><a class="email" href="mailto:crshman@gmail.com" title="Robert N <crshman@gmail.com>"> <span class="fn">Robert N</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=73943#c6">comment #6</a>)
<span class="quote">> 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...</span >
The monitors are independent when they blank, here's a video:
<a href="http://www.youtube.com/watch?v=7L5vZz-APUM">http://www.youtube.com/watch?v=7L5vZz-APUM</a>
<span class="quote">> 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.</span >
Here is the tool I used to test:
<a href="http://recordmydesktop.sourceforge.net/about.php">http://recordmydesktop.sourceforge.net/about.php</a>
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.
<a href="http://www.youtube.com/watch?v=hftue_XLusU">http://www.youtube.com/watch?v=hftue_XLusU</a></pre>
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