Thanks to Daniel Vetter & Co. over at intel-linux-graphics. They finally fixed my Sandy Bridge backlight problem or perhaps I should say problems. You can find the discussion and progress at bug 48435. The fix is in the 3.5-rc2+ kernel that can be found here at the bottom of the page:
Code:
Clone
git://people.freedesktop.org/~danvet/drm-intel
ssh://people.freedesktop.org/~danvet/drm-intel
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