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These two articles indicate that the off-screen front buffer is part of the Windows Vista/7 driver model (WDDM).
http://www.opengl.org/pipeline/article/vol003_7/
Not even switching the DWM off is likely to fix these, given that the off-screen front buffer is a requirement of the driver model itself.
http://blogs.msdn.com/b/greg_schechter/archive/2006/05/02/588934.aspx
It is widely documented that the Desktop Window Manager (DWM) composites the front buffers for rendering to the screen.
My question is this: if the off-screen front buffers are used whether DWM is enabled or not, what performs the composition operation when DWM is disabled?
I'm also looking for any good references about how Windows 7 behaves when DWM is disabled. Does it just fall back to the stacking window model of XP?