brightness problem with GTX 765M in iMac 11,1

highvoltage12v · Jan 11, 2020

Yes no problem.
In clover i changed board-id under smbios (on picture) and under Rt Variables i changed BooterConfig (0x0028) and CsrActiveConfig (0x0067) to disable system protection.

View attachment 364905 View attachment 364906
In DSDT i only modified under Device (GFX0) connector-types, display-connect-flags, hotplug, etc...
Probably not all is needed but experimenting.

Code:

                Device (GFX0)
                {
                    Name (_ADR, Zero)  // _ADR: Address
                    Name (_PRW, Package (0x02)  // _PRW: Power Resources for Wake
                    {
                        0x09,
                        0x04
                    })
                    OperationRegion (PEGH, PCI_Config, Zero, 0x40)
                    Field (PEGH, ByteAcc, NoLock, Preserve)
                    {
                        VID0,   16,
                        DID0,   16
                    }

                    Method (_DOD, 0, NotSerialized)  // _DOD: Display Output Devices
                    {
                        Return (Package (0x01)
                        {
                            0x80002400
                        })
                    }

                    Method (_DSM, 4, NotSerialized)  // _DSM: Device-Specific Method
                    {
                        If (LEqual (Arg0, ToUUID ("a0b5b7c6-1318-441c-b0c9-fe695eaf949b")))
                        {
                            If (LNotEqual (And (VID0, 0xFFFF), 0xFFFF))
                            {
                                Store (Package (0x50)
                                    {
                                        "graphic-options",
                                        Buffer (0x04)
                                        {
                                             0x0C, 0x00, 0x00, 0x00                      
                                        },

                                        "built-in",
                                        Buffer (One)
                                        {
                                             0x00                                        
                                        },

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

                                        "AAPL00,inverterFrequency",
                                        Buffer (0x04)
                                        {
                                             0x1C, 0x02, 0x00, 0x00                      
                                        },

                                        "AAPL00,inverter",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "AAPL00,DataJustify",
                                        Buffer (0x04)
                                        {
                                             0x01, 0x00, 0x00, 0x00                      
                                        },

                                        "AAPL,aux-power-connected",
                                        Buffer (0x04)
                                        {
                                             0x01, 0x00, 0x00, 0x00                      
                                        },

                                        "AAPL,interrupts",
                                        Buffer (0x08)
                                        {
                                             0x10, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00
                                        },

                                        "subsystem-id",
                                        Buffer (0x04)
                                        {
                                             0x10, 0x00, 0x00, 0x00                      
                                        },

                                        "com-master-varp",
                                        Buffer (0x08)
                                        {
                                             0x00, 0x60, 0x81, 0xC4, 0x81, 0xFF, 0xFF, 0xFF
                                        },

                                        "NVDA,invalid-config",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "AAPL01,blackscreen-preferences",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "NVCAP",
                                        Buffer (0x14)
                                        {
                                            /* 0000 */  0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF,
                                            /* 0008 */  0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0E,
                                            /* 0010 */  0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "@0,connector-type",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x04, 0x00, 0x00                      
                                        },

                                        "@1,connector-type",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x04, 0x00, 0x00                      
                                        },

                                        "@2,connector-type",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,connector-type",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x04, 0x00, 0x00                      
                                        },

                                        "@0,display-connect-flags",
                                        Buffer (0x04)
                                        {
                                             0x04, 0x00, 0x00, 0x00                      
                                        },

                                        "@1,display-connect-flags",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "@2,display-connect-flags",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,display-connect-flags",
                                        Buffer (0x04)
                                        {
                                             0x04, 0x00, 0x00, 0x00                      
                                        },

                                        "@1,can-hot-plug",
                                        Buffer (0x04)
                                        {
                                             0x01, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,can-hot-plug",
                                        Buffer (0x04) {},
                                        "@3,built-in",
                                        Buffer (Zero) {},
                                        "@3,pwm-info",
                                        Buffer (0x18)
                                        {
                                            /* 0000 */  0x02, 0x18, 0x00, 0x64, 0x90, 0x59, 0x02, 0x00,
                                            /* 0008 */  0x08, 0x52, 0x00, 0x00, 0xA5, 0x1C, 0x00, 0x00,
                                            /* 0010 */  0x00, 0x04, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00
                                        },

                                        "@3,dpcd-registers",
                                        Buffer (0x0700)
                                        {
                                            /* 0000 */  0x11, 0x0A, 0x84, 0x01, 0x01, 0x00, 0x01, 0x80,
                                            /* 0008 */  0x02, 0x01, 0x04, 0x01, 0x0F, 0x00, 0x00, 0x00,
                                            /* 0010 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0018 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0020 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0028 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0030 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0038 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0040 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0048 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0050 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0058 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0060 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0068 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0070 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0078 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0080 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0088 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0090 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0098 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00A0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00A8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0100 */  0x0A, 0x84, 0x00, 0x08, 0x08, 0x08, 0x08, 0x10,
                                            /* 0108 */  0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0110 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0118 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0120 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0128 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0130 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0138 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0140 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0148 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0150 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0158 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0160 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0168 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0170 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0178 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0180 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0188 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0190 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0198 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01A0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01A8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 01F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0200 */  0x01, 0x00, 0x77, 0x77, 0x01, 0x01, 0x44, 0x44,
                                            /* 0208 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0210 */  0x58, 0x80, 0x5E, 0x80, 0x55, 0x80, 0x53, 0x80,
                                            /* 0218 */  0x00, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0220 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0228 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0230 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0238 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0240 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0248 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0250 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0258 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0260 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0268 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0270 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0278 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0280 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0288 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0290 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0298 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02A0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02A8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 02F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0300 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0308 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0310 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0318 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0320 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0328 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0330 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0338 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0340 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0348 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0350 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0358 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0360 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0368 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0370 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0378 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0380 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0388 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0390 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0398 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03A0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03A8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 03F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0400 */  0x00, 0x10, 0xFA, 0x4D, 0x4F, 0x4E, 0x32, 0x37,
                                            /* 0408 */  0x61, 0x11, 0x13, 0x34, 0x11, 0x04, 0x00, 0x00,
                                            /* 0410 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0418 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0420 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0428 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0430 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0438 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0440 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0448 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0450 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0458 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0460 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0468 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0470 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0478 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0480 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0488 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0490 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0498 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04A0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04A8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 04F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0500 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0508 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0510 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0518 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0520 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0528 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0530 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0538 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0540 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0548 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0550 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0558 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0560 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0568 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0570 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0578 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0580 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0588 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0590 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0598 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05A0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05A8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 05F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0600 */  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0608 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0610 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0618 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0620 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0628 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0630 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0638 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0640 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0648 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0650 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0658 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0660 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0668 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0670 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0678 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0680 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0688 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0690 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0698 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06A0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06A8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 06F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
                                        },

                                        "@3,display-dither-support",
                                        Buffer (0x04)
                                        {
                                             0x01, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,fboffset",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x02, 0x00                      
                                        },

                                        "@3,av-signal-type",
                                        Buffer (0x04)
                                        {
                                             0x10, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,EDID",
                                        Buffer (0x0100)
                                        {
                                            /* 0000 */  0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00,
                                            /* 0008 */  0x06, 0x10, 0xB5, 0x9C, 0x00, 0x00, 0x00, 0x00,
                                            /* 0010 */  0x1C, 0x13, 0x01, 0x04, 0xA5, 0x3C, 0x22, 0x78,
                                            /* 0018 */  0x22, 0x6F, 0xB1, 0xA7, 0x55, 0x4C, 0x9E, 0x25,
                                            /* 0020 */  0x0C, 0x50, 0x54, 0x00, 0x00, 0x00, 0x01, 0x01,
                                            /* 0028 */  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
                                            /* 0030 */  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x56, 0x5E,
                                            /* 0038 */  0x00, 0xA0, 0xA0, 0xA0, 0x29, 0x50, 0x30, 0x20,
                                            /* 0040 */  0x35, 0x00, 0x55, 0x50, 0x21, 0x00, 0x00, 0x1A,
                                            /* 0048 */  0x1A, 0x1D, 0x00, 0x80, 0x51, 0xD0, 0x1C, 0x20,
                                            /* 0050 */  0x40, 0x80, 0x35, 0x00, 0x55, 0x50, 0x21, 0x00,
                                            /* 0058 */  0x00, 0x1C, 0x00, 0x00, 0x00, 0x02, 0x01, 0x06,
                                            /* 0060 */  0x10, 0x01, 0x0A, 0x01, 0x00, 0x00, 0x00, 0x00,
                                            /* 0068 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFC,
                                            /* 0070 */  0x00, 0x43, 0x6F, 0x6C, 0x6F, 0x72, 0x20, 0x4C,
                                            /* 0078 */  0x43, 0x44, 0x0A, 0x20, 0x20, 0x20, 0x01, 0x08,
                                            /* 0080 */  0x02, 0x03, 0x0C, 0xC1, 0x23, 0x09, 0x07, 0x07,
                                            /* 0088 */  0x83, 0x01, 0x00, 0x00, 0x56, 0x5E, 0x00, 0xA0,
                                            /* 0090 */  0xA0, 0xA0, 0x29, 0x50, 0x30, 0x20, 0x35, 0x00,
                                            /* 0098 */  0x55, 0x50, 0x21, 0x00, 0x00, 0x1A, 0x1A, 0x1D,
                                            /* 00A0 */  0x00, 0x80, 0x51, 0xD0, 0x1C, 0x20, 0x40, 0x80,
                                            /* 00A8 */  0x35, 0x00, 0x55, 0x50, 0x21, 0x00, 0x00, 0x1C,
                                            /* 00B0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00B8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00C0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00C8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00D0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00D8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00E0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00E8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00F0 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 00F8 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x13
                                        },

                                        "@3,port-number",
                                        Buffer (0x04)
                                        {
                                             0x07, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,use-backlight-blanking",
                                        Buffer (Zero) {},
                                        "@3,display-power-sequence",
                                        Buffer (0x30)
                                        {
                                            /* 0000 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0008 */  0x01, 0x00, 0x00, 0x00, 0xC8, 0x00, 0x00, 0x00,
                                            /* 0010 */  0xC8, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
                                            /* 0018 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0020 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                                            /* 0028 */  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
                                        },

                                        "@3,backlight-control",
                                        Buffer (0x04)
                                        {
                                             0x01, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,AAPL,gray-value",
                                        Buffer (0x04)
                                        {
                                             0x00, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,NVDA,UnderscanMin",
                                        Buffer (0x04)
                                        {
                                             0x52, 0x00, 0x00, 0x00                      
                                        },

                                        "@3,AAPL,boot-display",
                                        Buffer (Zero) {},
                                        "@3,dpcd-post-training",
                                        Buffer (0x06)
                                        {
                                             0x77, 0x77, 0x01, 0x00, 0x00, 0x00          
                                        },

                                        "@3,nativeNDRV",
                                        Buffer (0x05)
                                        {
                                            "advn"
                                        },

                                        "hda-gfx",
                                        Buffer (0x0A)
                                        {
                                            "onboard-1"
                                        }
                                    }, Local0)
                                DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
                                Return (Local0)
                            }
                        }

                        Return (0x80000002)
                    }
                }

Please share your findings.

Your code is great, i'm using bits of it for the 2011 iMac and a 770m. I am using Open Core as a bootloader and a 2011 DSDT. First I have to change all display maps from @3 to @0 because at least with the 2011 iMac @0 is the internal Display. I have the display showing up as Built in and Target Display Mode is working. When controlling brightness from another Mac, I can change the brightness no problem. But From System preferences within Mac OS the slider doesn't change brightness. I manually created my EDID for my LCD but it turns out they are pretty much identical. I think it's related to the PWM values entered, but I am unsure how to generate them. Thank you for the work you have put into this. I will upload my DSDT later today.

CoolBits2 · Jan 11, 2020

Yes display maps @0 also on other compatible cards after Nick's vbios, looks like he changed outputs too.
For brightness control i tried a lot of different PWM settings but nothing worked so far. So i went for HW mod.
Entering EDID is not necessary as it gets detected ok.

highvoltage12v · Jan 11, 2020

CoolBits2 said:
Yes display maps @0 also on other compatible cards after Nick's vbios, looks like he changed outputs too.
For brightness control i tried a lot of different PWM settings but nothing worked so far. So i went for HW mod.
Entering EDID is not necessary as it gets detected ok.

Me and Nick have brightness working on the 2011 21.5" models but had panicking from AGPM on the 27". Your DSDT was able to fix this issue (built-in) we we're having. Which is making great progress. Its just been a while since I Heard from Nick, I'm sure he could make the Same Vbios change to the 7xx cards as the Quadros for Brightness.

Razer0r · Mar 28, 2020

highvoltage12v said:
Me and Nick have brightness working on the 2011 21.5" models but had panicking from AGPM on the 27". Your DSDT was able to fix this issue (built-in) we we're having. Which is making great progress. Its just been a while since I Heard from Nick, I'm sure he could make the Same Vbios change to the 7xx cards as the Quadros for Brightness.

if youneed a tester for some, I have an 2011 iMac with a GTX 765mcurrentlyrunning on your v3 vbios, amazing to get this far, never thought I could revive my imac after the gpu died on me 6 months ago

pmidmaker · Aug 19, 2020

Are you talking about DSDT in iMac 2011 27"?

pmidmaker · Aug 24, 2020

Razer0r said:
if youneed a tester for some, I have an 2011 iMac with a GTX 765mcurrentlyrunning on your v3 vbios, amazing to get this far, never thought I could revive my imac after the gpu died on me 6 months ago

Please can you share how you've got it?
Ty

gersonbernardo · Aug 24, 2020

highvoltage12v said:
Me and Nick have brightness working on the 2011 21.5" models but had panicking from AGPM on the 27". Your DSDT was able to fix this issue (built-in) we we're having. Which is making great progress. Its just been a while since I Heard from Nick, I'm sure he could make the Same Vbios change to the 7xx cards as the Quadros for Brightness.

Hi, do you have any news about the brightness control using GTX 765M?

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