[Bug 84561] [ivb] Intel backlight does not adjust, but only turns on/off in kernel 3.16 on Samsung 880Z5E laptop

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=84561

--- Comment #9 from Aaron Lu <aaron.lu at intel.com> ---
(In reply to Vitaliy Filippov from comment #6)
> Posted it :)

Sorry for the late reply.
>From the ASL code, it seems to be EC that controls backlight:
Name (BRTM, One)
In _BCM:
If (LEqual (BRTM, One))
{
        Store (Arg0, ^^^LPCB.H_EC.BRIT)
        Store (Arg0, BRTL)
        Return (Zero)
}

Please attach your dmidecode:
# dmidecode > dmi.txt

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