Laptop Screen Brightness Conflict With Video Card Driver.

[kingoffright]

Hi,guys~! Today I get a code of laptop screen brightness which can adjust the brightness after enter the system. It should be add into the GFX0 device, here is the code:
Method (_DSM, 4, NotSerialized)
{
Store (Package (0x0C)
{
"DisplayProductID",
Buffer (0x04)
{
0x5F, 0x9C, 0x00, 0x00
},

"DisplayVendorID",
Buffer (0x04)
{
0x10, 0x06, 0x00, 0x00
},

"AAPL,HasPanel",
Buffer (0x04)
{
0x01, 0x00, 0x00, 0x00
},

"AAPL,backlight-control",
Buffer (0x04)
{
0xEE, 0x01, 0x00, 0x00
},

"AAPL01,DualLink",
Buffer (0x04)
{
0x01, 0x00, 0x00, 0x00
},

"AAPL01,EDID",
Buffer (0x80)
{
/* 0000 */ 0X00, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF, 0X00,
/* 0008 */ 0X30, 0XE4, 0X8B, 0X01, 0X00, 0X00, 0X00, 0X00,
/* 0010 */ 0X00, 0X12, 0X01, 0X03, 0X80, 0X1F, 0X11, 0X78,
/* 0018 */ 0X0A, 0X4A, 0X05, 0X9E, 0X5B, 0X54, 0X95, 0X25,
/* 0020 */ 0X18, 0X50, 0X54, 0X00, 0X00, 0X00, 0X01, 0X01,
/* 0028 */ 0X01, 0X01, 0X01, 0X01, 0X01, 0X01, 0X01, 0X01,
/* 0030 */ 0X01, 0X01, 0X01, 0X01, 0X01, 0X01, 0X3E, 0X1C,
/* 0038 */ 0X56, 0XA0, 0X50, 0X00, 0X16, 0X30, 0X30, 0X20,
/* 0040 */ 0X35, 0X00, 0X36, 0XAE, 0X10, 0X00, 0X00, 0X19,
/* 0048 */ 0X00, 0X00, 0X00, 0X00, 0X00, 0X00, 0X00, 0X00,
/* 0050 */ 0X00, 0X00, 0X00, 0X00, 0X00, 0X00, 0X00, 0X00,
/* 0058 */ 0X00, 0X00, 0X00, 0X00, 0X00, 0XFE, 0X00, 0X4C,
/* 0060 */ 0X47, 0X20, 0X44, 0X69, 0X73, 0X70, 0X6C, 0X61,
/* 0068 */ 0X79, 0X0A, 0X20, 0X20, 0X00, 0X00, 0X00, 0XFE,
/* 0070 */ 0X00, 0X4C, 0X50, 0X31, 0X34, 0X30, 0X57, 0X48,
/* 0078 */ 0X31, 0X2D, 0X54, 0X4C, 0X41, 0X31, 0X00, 0X75
}
}, Local0)
DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
Return (Local0)
}



unfortunely, my video card had used the method _DSM already~!:'(
Device (PEGP)
{
Name (_ADR, 0x00010000)
Device (GFX0)
{
Name (_ADR, Zero)
Name (_SUN, One)
Method (_DSM, 4, NotSerialized)
{
Store (Package (0x16)
{
"@0,compatible",
Buffer (0x0B)
{
"NVDA,NVMac"
},

"@0,device_type",
Buffer (0x08)
{
"display"
},

"@0,name",
Buffer (0x0F)
{
"NVDA,Display-A"
},

"@1,compatible",
Buffer (0x0B)
{
"NVDA,NVMac"
},

"@1,device_type",
Buffer (0x08)
{
"display"
},

"@1,name",
Buffer (0x0F)
{
"NVDA,Display-B"
},

"NVCAP",
Buffer (0x18)
{
/* 0000 */ 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
/* 0008 */ 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07,
/* 0010 */ 0x00, 0x00, 0x00, 0x00
},

"VRAM,totalsize",
Buffer (0x04)
{
0x00, 0x00, 0x00, 0x20
},

"device_type",
Buffer (0x0D)
{
"NVDA,GeForce"
},

"model",
Buffer (0x17)
{
"nVidia GeForce GT 240M"
},

"rom-revision",
Buffer (0x25)
{
"nVidia GeForce GT 240M OpenGL Engine"
}
}, Local0)
DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
Return (Local0)
}
}
}



both of them had use the DTGP method :), but I can't figure out how this work in the above codes :(:
Method (DTGP, 5, NotSerialized)
{
If (LEqual (Arg0, Buffer (0x10)
{
/* 0000 */ 0xC6, 0xB7, 0xB5, 0xA0, 0x18, 0x13, 0x1C, 0x44,
/* 0008 */ 0xB0, 0xC9, 0xFE, 0x69, 0x5E, 0xAF, 0x94, 0x9B
}))
{
If (LEqual (Arg1, One))
{
If (LEqual (Arg2, Zero))
{
Store (Buffer (One)
{
0x03
}, Arg4)
Return (One)
}

If (LEqual (Arg2, One))
{
Return (One)
}
}
}

Store (Buffer (One)
{
0x00
}, Arg4)
Return (Zero)
}



I had tried many ways, including put them together into GFX0, but with _DSM method already used...
get the contents in one Store (Package (0x0C) { ... }, this result in only the video card driver works only...
I had another GFX0 with Name (_ADR, 0x00020000), I put the screen brightness code method to it, but couldn't adjust the brightnees at all.
I really appreciate you guys if could give me a help or any ways may help with this issue. Thanks anyway~!:)