[Bug 107600] Regression: stuttering H.264 video w/ mythtv on old laptop w/ 915GM igp

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107600

--- Comment #5 from Chris Wilson <chris at chris-wilson.co.uk> ---

commit 6a2c4232ece145d8b5a8f95f767bd6d0d2d2f2bb was required to fix some cursor
corruption; but it should only affect the cursor plane on creation. There
should be no need for frequent recreation of the cursor (as I recall the cursor
plane is kept for as long as it sized correctly, and even if disabled only
destroyed on the next modeset).

Put a WARN in i915_gem_object_attach_phys() to see how frequently that code is
being called. If it is being called, grab an xorg debug log (xf86-video-intel
compiled with --enable-debug=full) for the next question is why. If not, the
problem is nothing to do with the phys object.

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