[Bug 81515] [IVB Regression] Backlight is not adjustable and set at maximum level in kernels 3.16-rcX on HD 4000

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81515

--- Comment #20 from Aaron Lu <aaron.lu at intel.com> ---
Yes we already did that. Hohahiu's laptop also claims to be Win8 in that its
ACPI table has a _OSI("Windows 2012") query, that's all what we can judge. We
don't really know if OEM has put a Win7 or a Win8 in it. If we know that, that
would be a better hint than the _OSI query.

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