[Bug 59726] [ivb (optimus) LVDS] Boots to blank screen, ACPI backlight woes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59726

--- Comment #18 from Chris Wilson <chris at chris-wilson.co.uk> ---
Codito ergo sum.

I think the only way we can get this solved is to beat up a few ACPI firmware
engineers and see if the various ACPI drivers can make any traction. Other than
trying to follow the guidelines and picking the preferred backlight interface
(multiple drivers suck) there is little else we can do in the gfx driver.

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