    //
    DefinitionBlock("", "SSDT", 2, "OCLT", "PNLFACPI", 0)
    {
        External(_SB.PCI0.IGPU, DeviceObj)
        External(_SB.PCI0.IGPU.DD1F._BCL, MethodObj)
        External(_SB.PCI0.IGPU.DD1F._BCM, MethodObj)
        External(_SB.PCI0.IGPU.DD1F._BQC, MethodObj)
        External(_SB.PCI0.IGPU._DOS, MethodObj)

        Scope(_SB.PCI0.IGPU)
        {
            Device(PNLF)
            {
                Name (_ADR, Zero)
                Name (_HID, EisaId ("APP0002"))
                Name (_CID, "backlight")
                Name (_UID, 10)
                // _BCM/_BQC: set/get for brightness level
                Method (_BCM, 1, NotSerialized)
                {
                    ^^DD1F._BCM(Arg0)
                }
                Method (_BQC, 0, NotSerialized)
                {
                    Return(^^DD1F._BQC())
                }
                Method (_BCL, 0, NotSerialized)
                {
                    Return(^^DD1F._BCL())
                }
                Method (_DOS, 1, NotSerialized)
                {
                    ^^_DOS(Arg0)
                }
                // extended _BCM/_BQC for setting "in between" levels
                Method (XBCM, 1, NotSerialized)
                {
                    // Update backlight via existing DSDT methods
                    ^^DD1F._BCM(Arg0)
                }
                Method (XBQC, 0, NotSerialized)
                {
                    Return(^^DD1F._BQC())
                }
                // Use XOPT=1 to disable smooth transitions
                Name (XOPT, Zero)
                // XRGL/XRGH: defines the valid range
                Method (XRGL, 0, NotSerialized)
                {
                    Store(_BCL(), Local0)
                    Store(DerefOf(Index(Local0, 2)), Local0)
                    Return(Local0)
                }
                Method (XRGH, 0, NotSerialized)
                {
                    Store(_BCL(), Local0)
                    Store(DerefOf(Index(Local0, Subtract(SizeOf(Local0), 1))), Local0)
                    Return(Local0)
                }
                Method (_INI, 0, NotSerialized)
                {
                    //XRGL()
                    //XRGH()
                }
                Method (_STA, 0, NotSerialized)
                {
                    If (_OSI ("Darwin"))
                    {
                        Return (0x0B)
                    }
                    Else
                    {
                        Return (Zero)
                    }
                }
            }
        }
    }
    //EOF

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