[Bug 57501] [BISECTED] i915: power regression when display is off

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=57501





--- Comment #9 from Chris Wilson <chris at chris-wilson.co.uk>  2013-05-03 15:57:58 ---
The close button is intentional, by the toolkit's own request.(The only issue
is that UXA doesn't have a faster less precise mode and so always ignores the
application's request in that regard.)

The chromium issue looks to be the gen4 GPU bug -- something is very wrong
inside the GPU regarding stale VUEs. UXA doesn't trip over this, as it uses a
much, much larger hammer to workaround an even more critical gen4 GPU bug. For
SNA, I found a smaller hammer which gets past the first problem of sending more
than one rectangle to processed by the GPU at one time, but then exposes us to
the fact that the GPU sometimes misrenders when it has multiple rectangles.
It's a pita.

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