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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - IOQuake is jerky"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95200#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - IOQuake is jerky"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95200">bug 95200</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>The throttling is:
batch = do swap copy
on each vblank after:
if idle(batch): report swap done
Within mesa there is also (or should be) equivalent swap throttling. So this
shouldn't be substantially different, yet it is. If you have the time and
patience, compiling the xf86-video-intel with --enable-debug=full (and the
resultant Xorg.0.log) should confirm what I've just said.
Hmm, good, there is also an
Option "NoVSync"
could you try that? That will keep the swap buffer throttling, but disable the
synchronous update on screen (presuming it is currently). That may be causing a
huge delay and backlog.</pre>
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