[Bug 38800] glXSwapBuffersMscOML is slow on AMD Fusion but not on Intel 945 w/Atom

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=38800

--- Comment #22 from Alex Deucher <agd5f at yahoo.com> 2011-07-06 14:13:27 PDT ---
FWIW, the pageflip interrupts weren't too reliable at least on 6xx, but they
seemed to work ok on 7xx+.  Also, I can see problems where you might not get
interrupts for some flips if a later base update write comes in via the CP
before the irq handler has acked the interrupt from the frame before it.  FWIW,
I asked internally and the closed driver uses vblanks. 

Also for reference, Simon's new patch:
http://lists.freedesktop.org/archives/dri-devel/2011-July/012807.html

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