[Bug 61152] Ubuntu12.04.2 LinearFramebuffer under extended mode broken by intel_gen4_compute_offset_xtiled()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61152

--- Comment #16 from Chris Wilson <chris at chris-wilson.co.uk> ---
Depending on your exact usage, if you have a screen wider than 1024 pixels
across, the difference in performance is between 3-30x in favour of tiling.
Considering that the Intel driver is preferrable in all cases except for
gaming, it seems that you are penalising the major use case of those machines.

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