AMD Radeon HD 6650M / Graphics Enabler / DSDT / HDMI Audio / Acer Aspire 7750G - 2674G50Mnkk [Gradients Fixed]

DavidRocha · July 11, 2013

My VBIOS

deschutes · July 12, 2013

@deschutes

Try this DSDT at your own risk, framebuffer is set to Ipomoea.

DSDT.aml.zip Replaced, sorry for the wrong model name.

Hi Trucker,

Thanks - I tried with DSDT but had no luck. Now I cleaned up all files and started from the beginning. With pure 10.8.4 ATI6000Controller.kext + Clean latest Chameleon v2.2svn r2254 + No DSDT

If I bood with GraphicsEnabler=Yes, HDMI output is always working nicely without any ATIConfig flags. LVDS is always black with backlight turned on.

Now I am starting to edit ATI6000Controller.kext. I think it would be better to start with a personality which has same number of connectors (for me, it was five connectors based on vbios extraction)

For LVDS, I guss I can just edit first line of the hex values.

These are personalities with five connectors :

Personality: Hydrilla

ConnectorInfo count in decimal: 5

Disk offset in decimal 179664

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000020 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000030 00 04 00 00 00 01 00 00 00 09 10 00 22 05 05 04

0000040 00 04 00 00 04 03 00 00 00 01 00 00 10 00 04 05

0000050

Personality: Elodea

ConnectorInfo count in decimal: 5

Disk offset in decimal 179872

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 10 00 05 05

0000020 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000030 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000040 00 04 00 00 00 01 00 00 00 09 10 00 22 05 04 04

0000050

Personality: Elodea

ConnectorInfo count in decimal: 5

Disk offset in decimal 179872

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 10 00 05 05

0000020 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000030 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000040 00 04 00 00 00 01 00 00 00 09 10 00 22 05 04 04

0000050

Personality: Typha

ConnectorInfo count in decimal: 5

Disk offset in decimal 180464

0000000 00 04 00 00 04 03 00 00 00 01 01 00 11 02 04 01

0000010 00 04 00 00 04 03 00 00 00 01 02 00 21 03 05 02

0000020 00 04 00 00 00 01 00 00 00 09 03 00 10 00 02 05

0000030 00 04 00 00 00 01 00 00 00 09 04 00 20 01 03 06

0000040 04 00 00 00 14 02 00 00 00 01 05 00 02 04 01 03

0000050

-----------------------------------------------------------------------------------------------

From these, I chose this Hydrilla, since it is already starting with 02 00 00 00 (LVDS)

Personality: Hydrilla

ConnectorInfo count in decimal: 5

Disk offset in decimal 179664

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000020 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000030 00 04 00 00 00 01 00 00 00 09 10 00 22 05 05 04

0000040 00 04 00 00 04 03 00 00 00 01 00 00 10 00 04 05

0000050

For this first line, I editied based on following vbios information for LVDS :

PCI ID: 1002:6841

Connector at index 0

Type [@offset 44650]: LVDS (7) =

Encoder [@offset 44654]: INTERNAL_UNIPHY (0x1e)

i2cid [@offset 44760]: 0x90, OSX senseid: 0x1

Connector at index 1

Type [@offset 44660]: DisplayPort (10)

Encoder [@offset 44664]: INTERNAL_UNIPHY1 (0x20)

i2cid [@offset 44783]: 0x94, OSX senseid: 0x5

Connector at index 2

Type [@offset 44670]: DisplayPort (10)

Encoder [@offset 44674]: INTERNAL_UNIPHY1 (0x20)

i2cid [@offset 44810]: 0x91, OSX senseid: 0x2

Connector at index 3

Type [@offset 44680]: DisplayPort (10)

Encoder [@offset 44684]: INTERNAL_UNIPHY2 (0x21)

i2cid [@offset 44837]: 0x92, OSX senseid: 0x3

Connector at index 4

Type [@offset 44690]: VGA (1)

Encoder [@offset 44694]: INTERNAL_KLDSCP_DAC1 (0x15)

i2cid [@offset 44864]: 0x97, OSX senseid: 0x8

HP/Foxconn Casper Thames Pro GDDR5 128Mx16 64bit 500e/600m 0.9V

Subsystem Vendor ID: 103c

Subsystem ID: 17a9

Object Header Structure Size: 332

Connector Object Table Offset: 48

Router Object Table Offset: 0

Encoder Object Table Offset: f3

Display Path Table Offset: 12

Connector Object Id [14] which is [LVDS]

encoder obj id [0x1e] which is [iNTERNAL_UNIPHY (osx txmit 0x10 [duallink 0x0] enc 0x0)] linkb: false

Connector Object Id [19] which is [DISPLAY_PORT]

encoder obj id [0x20] which is [iNTERNAL_UNIPHY1 (osx txmit 0x11 [duallink 0x1] enc 0x2)] linkb: false

Connector Object Id [19] which is [DISPLAY_PORT]

encoder obj id [0x20] which is [iNTERNAL_UNIPHY1 (osx txmit 0x21 [duallink 0x1] enc 0x3)] linkb: true

Connector Object Id [19] which is [DISPLAY_PORT]

encoder obj id [0x21] which is [iNTERNAL_UNIPHY2 (osx txmit 0x12 [duallink 0x2] enc 0x4)] linkb: false

Connector Object Id [5] which is [VGA]

encoder obj id [0x15] which is [iNTERNAL_KLDSCP_DAC1 (osx txmit 0x00 enc 0x10?)] linkb: false

Hydrilla

02 00 00 00 40 00 00 00 09 01 00 00 10 00 01 01

Not sure about this control flag part.

I think this ATI/AMD ROM Output Features is set correctly to LVDS and Internal : 0x01 and 0x09

For Transmitter and Encoder, I used 10 and 00. Not sure if this is correct.

This is my current situation

Still having no luck with LVDS.

If you have and advice, it would be really appreciated.

Thanks!

freeuser16 · July 13, 2013

@deschutes, try transmitter 10 + encoder 01. But if it works, probably you will have gradients. Control flags 40 00 00 00 usually work the best, but if the trick with encoder doesn't work you can try control flags from different framebuffers.

Flix1337 · July 15, 2013

Hi,

I want to get the AMD Radeon 6550M working on my Laptop. I managed to install and start OSX. My Problem is now the native Resolution. I tried many kexts I found but nothing works. Can anyone help? VBios Dump and my DSDT extracted with AIDA64 are in the Attachment. I hope they are the right files.

Files.zip

Trucker MK · July 17, 2013

Hi Trucker,

Thanks - I tried with DSDT but had no luck. Now I cleaned up all files and started from the beginning. With pure 10.8.4 ATI6000Controller.kext + Clean latest Chameleon v2.2svn r2254 + No DSDT

If I bood with GraphicsEnabler=Yes, HDMI output is always working nicely without any ATIConfig flags. LVDS is always black with backlight turned on.

Now I am starting to edit ATI6000Controller.kext. I think it would be better to start with a personality which has same number of connectors (for me, it was five connectors based on vbios extraction)

For LVDS, I guss I can just edit first line of the hex values.

These are personalities with five connectors :

Personality: Hydrilla
ConnectorInfo count in decimal: 5

Disk offset in decimal 179664

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000020 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000030 00 04 00 00 00 01 00 00 00 09 10 00 22 05 05 04

0000040 00 04 00 00 04 03 00 00 00 01 00 00 10 00 04 05

0000050

Personality: Elodea
ConnectorInfo count in decimal: 5

Disk offset in decimal 179872

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 10 00 05 05

0000020 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000030 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000040 00 04 00 00 00 01 00 00 00 09 10 00 22 05 04 04

0000050

Personality: Elodea
ConnectorInfo count in decimal: 5

Disk offset in decimal 179872

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 10 00 05 05

0000020 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000030 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000040 00 04 00 00 00 01 00 00 00 09 10 00 22 05 04 04

0000050

Personality: Typha
ConnectorInfo count in decimal: 5

Disk offset in decimal 180464

0000000 00 04 00 00 04 03 00 00 00 01 01 00 11 02 04 01

0000010 00 04 00 00 04 03 00 00 00 01 02 00 21 03 05 02

0000020 00 04 00 00 00 01 00 00 00 09 03 00 10 00 02 05

0000030 00 04 00 00 00 01 00 00 00 09 04 00 20 01 03 06

0000040 04 00 00 00 14 02 00 00 00 01 05 00 02 04 01 03

0000050

-----------------------------------------------------------------------------------------------

From these, I chose this Hydrilla, since it is already starting with 02 00 00 00 (LVDS)

Personality: Hydrilla
ConnectorInfo count in decimal: 5

Disk offset in decimal 179664

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03

0000010 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000020 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000030 00 04 00 00 00 01 00 00 00 09 10 00 22 05 05 04

0000040 00 04 00 00 04 03 00 00 00 01 00 00 10 00 04 05

0000050

For this first line, I editied based on following vbios information for LVDS :

PCI ID: 1002:6841

Connector at index 0

Type [@offset 44650]: LVDS (7) =

Encoder [@offset 44654]: INTERNAL_UNIPHY (0x1e)

i2cid [@offset 44760]: 0x90, OSX senseid: 0x1

Connector at index 1

Type [@offset 44660]: DisplayPort (10)

Encoder [@offset 44664]: INTERNAL_UNIPHY1 (0x20)

i2cid [@offset 44783]: 0x94, OSX senseid: 0x5

Connector at index 2

Type [@offset 44670]: DisplayPort (10)

Encoder [@offset 44674]: INTERNAL_UNIPHY1 (0x20)

i2cid [@offset 44810]: 0x91, OSX senseid: 0x2

Connector at index 3

Type [@offset 44680]: DisplayPort (10)

Encoder [@offset 44684]: INTERNAL_UNIPHY2 (0x21)

i2cid [@offset 44837]: 0x92, OSX senseid: 0x3

Connector at index 4

Type [@offset 44690]: VGA (1)

Encoder [@offset 44694]: INTERNAL_KLDSCP_DAC1 (0x15)

i2cid [@offset 44864]: 0x97, OSX senseid: 0x8

HP/Foxconn Casper Thames Pro GDDR5 128Mx16 64bit 500e/600m 0.9V

Subsystem Vendor ID: 103c

Subsystem ID: 17a9

Object Header Structure Size: 332

Connector Object Table Offset: 48

Router Object Table Offset: 0

Encoder Object Table Offset: f3

Display Path Table Offset: 12

Connector Object Id [14] which is [LVDS]

encoder obj id [0x1e] which is [iNTERNAL_UNIPHY (osx txmit 0x10 [duallink 0x0] enc 0x0)] linkb: false

Connector Object Id [19] which is [DISPLAY_PORT]

encoder obj id [0x20] which is [iNTERNAL_UNIPHY1 (osx txmit 0x11 [duallink 0x1] enc 0x2)] linkb: false

Connector Object Id [19] which is [DISPLAY_PORT]

encoder obj id [0x20] which is [iNTERNAL_UNIPHY1 (osx txmit 0x21 [duallink 0x1] enc 0x3)] linkb: true

Connector Object Id [19] which is [DISPLAY_PORT]

encoder obj id [0x21] which is [iNTERNAL_UNIPHY2 (osx txmit 0x12 [duallink 0x2] enc 0x4)] linkb: false

Connector Object Id [5] which is [VGA]

encoder obj id [0x15] which is [iNTERNAL_KLDSCP_DAC1 (osx txmit 0x00 enc 0x10?)] linkb: false

Hydrilla

02 00 00 00 40 00 00 00 09 01 00 00 10 00 01 01

Not sure about this control flag part.

I think this ATI/AMD ROM Output Features is set correctly to LVDS and Internal : 0x01 and 0x09

For Transmitter and Encoder, I used 10 and 00. Not sure if this is correct.

This is my current situation Still having no luck with LVDS.

If you have and advice, it would be really appreciated.

Thanks!

1. Boot with clean ATI6000Controller.kext with GE=Yes and check in IORegExplorer which framebuffer is loaded by default (maybe its better to start with this one)

2. Change back the HotplugID from 01 to 03, you already have 01 in Hydrilla on the second port

Personality: Hydrilla

ConnectorInfo count in decimal: 5

Disk offset in decimal 179664

0000000 02 00 00 00 00 01 00 00 09 01 00 00 12 04 03 03 (02 00 00 00 40 00 00 00 09 01 00 00 10 00 01 01)

0000010 00 04 00 00 04 03 00 00 00 01 00 00 11 02 01 01

0000020 00 04 00 00 00 01 00 00 00 09 10 00 21 03 02 02

0000030 00 04 00 00 00 01 00 00 00 09 10 00 22 05 05 04

0000040 00 04 00 00 04 03 00 00 00 01 00 00 10 00 04 05

0000050

3. Try different Transmitter/Encoder values (in my VBIOS i also have transmitter/encoder 10/00 but its working with 20/01 when i use GE=Yes

4. Try with AtiPorts=X flag, where X is the number of the ports you have.

Good luck.

Hi,

I want to get the AMD Radeon 6550M working on my Laptop. I managed to install and start OSX. My Problem is now the native Resolution. I tried many kexts I found but nothing works. Can anyone help? VBios Dump and my DSDT extracted with AIDA64 are in the Attachment. I hope they are the right files.

Do you have switchable graphics?

Trucker MK · July 18, 2013

My VBIOS

I will take a look this weekend.

freeuser16 · July 18, 2013

@Trucker, I did some research on gradients problem.

My original EDID decoded with DarwinDumper:

Extracted contents:
header:          00 ff ff ff ff ff ff 00
serial number:   30 e4 dc 02 00 00 00 00 00 14
version:         01 03
basic params:    80 22 13 78 0a
chroma info:     a9 05 9f 5e 58 9c 26 19 50 54
established:     00 00 00
standard:        01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1:    58 1b 56 7e 50 00 0e 30 24 30 35 00 58 c2 10 00 00 19
descriptor 2:    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
descriptor 3:    00 00 00 fe 00 4c 47 20 44 69 73 70 6c 61 79 0a 20 20
descriptor 4:    00 00 00 fe 00 4c 50 31 35 36 57 48 34 2d 54 4c 41 31
extensions:      00
checksum:        79

And the one which works without gradients:

Extracted contents:
header:          00 ff ff ff ff ff ff 00
serial number:   06 af 2c 12 00 00 00 00 00 16
version:         01 04
basic params:    90 1d 10 78 02
chroma info:     19 c5 a0 58 52 95 26 0d 50 54
established:     00 00 00
standard:        01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1:    26 1b 56 64 50 00 16 30 30 20 36 00 25 a4 10 00 00 18
descriptor 2:    00 00 00 0f 00 00 00 00 00 00 00 00 00 00 00 00 00 20
descriptor 3:    00 00 00 fe 00 41 55 4f 0a 20 20 20 20 20 20 20 20 20
descriptor 4:    00 00 00 fe 00 42 31 33 33 58 54 46 30 31 2e 32 20 0a
extensions:      00
checksum:        25

Obviously, key parameters are "basic params" and "chroma info". Firstly, I tried replacing "chroma info" values in my EDID with the ones found in new EDID - no difference. Then I left "chroma info" the same, but replaced "basic params" instead and it worked without gradients!

I looked deeper and compared "basic params" in both EDIDs:

My original:

80 22 13 78 0a

New EDID:

90 1d 10 78 02

It's enough to replace only the first byte in original EDID (=> 90 22 13 78 0A) and it works without gradients! From Wikipedia (http://en.wikipedia.org/wiki/Extended_display_identification_data) we know, what are bits in this byte responsible for. 80 == 10 00 00 00, 90 == 10 01 00 00. So, only the 4th bit is different. And this is very weird. Since 7th bit is 1, this is a digital display. Thus,

Bit 7=1 Digital input. If set, the following bit definitions apply:

Bits 6–1 Reserved, must be 0

But if bits 6-1 are 0's (as in my original EDID), I have wrong colors or gradients when wrong encoder is set. I checked some EDID's from Apple monitors - they also don't have 0's in bits 6-1! Anyway, original EDID now works for me if I replace only one number there.

Next thing I did was replacing "chroma info" with the one from Apple display. They say (http://www.insanelymac.com/forum/topic/290077-get-your-display-recognized-and-working-as-imac-thunderbolt-macbook-pro-or-cinema-hd-display/) colors are better then. Personally, I saw no difference, but it's working good so I left it. I also changed serial number to the one from Apple display and added descriptor with monitor name. Result is cosmetic, but looks good, doesn't it?

Trucker MK · July 18, 2013

Well done, congrats. I will try the same for the weekend, last time i tried to inject different EDID with DSDT i had some success, i was getting black screen, i guess this should work. Thanks for sharing and once again, well done.

freeuser16 · July 18, 2013

You still have to inject EDID to make it work. If DSDT injection doesn't work, you can try DisplayMergeNub.kext. Maybe it works this way

BTW, I forgot to say - to get this "Built-in LG Display" line I had to replace one of descriptors with "00 00 00 FC 00 4C 47 0A 20 20 20 20 20 20 20 20 20 20" (FC means it's display name and 4C 47 are letters "LG". 0A shows this is the end of string and the rest of the space is filled with 20). Also it works only if you have serial number from Apple display. All in all, my new EDID looks like this:

00 FF FF FF FF FF FF 00

06 10 12 A0 00 00 00 00 1C 16 <= Serial from Apple iMac display

01 04

90 22 13 78 0A <= Gradients fix

6F B1 A7 55 4C 9E 25 0C 50 54 <= Apple Colors

00 00 00

01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01

58 1B 56 7E 50 00 0E 30 24 30 35 00 58 C2 10 00 00 19

00 00 00 FC 00 4C 47 0A 20 20 20 20 20 20 20 20 20 20 <= Descriptor for Built-in LG Display

00 00 00 FE 00 38 4C 1E 53 11 00 0A 20 20 20 20 20 20

00 00 00 FF 00 4C 50 31 35 36 57 48 0A 20 20 20 20 20

00

0D

deschutes · July 19, 2013

Hi Trucker,

With pure ATI6000Controller.kext and GraphicsEnabler=Yes, I got this IOReg (attached)

As I mentioned, external display port is working with this (I am writing this post with external monitor now:) ). LVDS is black+backlight

Under GFX, AMD6000Controller, I see ATY,Gibba, ATY,Lotus, ATY,Muskgrass.

And there are three ATY,Pondweed elements under GFX.

Does this mean one of these personality has been used for display port with correct framebuffer? And I can tweak it for LVDS?

Thanks!

7570M.ioreg.zip

Trucker MK · July 19, 2013

Pondweed is loaded as default framebuffer, you should start editing this one.

grexai926 · July 20, 2013

Hey @Trucker MK
Do you have any idea why power off doesn't work correctly? My problem is ( you remember ati 6470M i use dsdt that you written + os x 10.8.3 patched kext) when i go to switch off computer its starts to shut down, and then the computer doesn't swich off only black screen.
Other question does My DSDT works with mavericks10.9?

Trucker MK · July 20, 2013

Is it like this from the monent you started to use the DSDT, try to apply the shutdown patch with DSDTParser, and yes, your DSDT will work with Mavericks, but you need patched kext.

czar · July 20, 2013

Need help on my 6650m.. I don't understand all of this but did made a dump. Been trying all i could but came up a black screen during boot everytime. :/

vgabios.dmp.zip

GPUReport.txt

Trucker MK · July 21, 2013

Need help on my 6650m.. I don't understand all of this but did made a dump. Been trying all i could but came up a black screen during boot everytime. :/

You have different VBIOS, that's why you get black screen. Let me know your OS X version, i will patch a new kext for you if you can't do it your self. I also need your DSDT, EDID and IORegistryExplorer dump.

ATOM BIOS Rom: 
	SubsystemVendorID: 0x144d SubsystemID: 0xc0ac
	IOBaseAddress: 0xd000
	Filename: BR39495.928 
	BIOS Bootup Message: 
Samsung Veyron3D HRV Whistler Pro DDR3 64Mx16/128Mx16 600E/800M             

PCI ID: 1002:6741
Connector at index 0
	Type [@offset 44848]: eDP (14)
	Encoder [@offset 44852]: INTERNAL_UNIPHY2 (0x21)
	i2cid [@offset 44922]: 0x92, OSX senseid: 0x3
Connector at index 1
	Type [@offset 44858]: HDMI-A (11)
	Encoder [@offset 44862]: INTERNAL_UNIPHY1 (0x20)
	i2cid [@offset 44949]: 0x90, OSX senseid: 0x1
Connector at index 2
	Type [@offset 44868]: VGA (1)
	Encoder [@offset 44872]: INTERNAL_KLDSCP_DAC1 (0x15)
	i2cid [@offset 44976]: 0x97, OSX senseid: 0x8
device-1e2c4e:VBIOS trucker$

Samsung Veyron3D HRV Whistler Pro DDR3 64Mx16/128Mx16 600E/800M             

Subsystem Vendor ID: 144d
       Subsystem ID: c0ac
Object Header Structure Size: 226
Connector Object Table Offset: 34
Router Object Table Offset: 0
Encoder Object Table Offset: 9d
Display Path Table Offset: 12
Connector Object Id [20] which is [EDP]
	encoder obj id [0x21] which is [INTERNAL_UNIPHY2 (osx txmit 0x12 [duallink 0x2] enc 0x4)] linkb: false
Connector Object Id [12] which is [HDMI_TYPE_A]
	encoder obj id [0x20] which is [INTERNAL_UNIPHY1 (osx txmit 0x11 [duallink 0x1] enc 0x2)] linkb: false
Connector Object Id [5] which is [VGA]
	encoder obj id [0x15] which is [INTERNAL_KLDSCP_DAC1 (osx txmit 0x00 enc 0x10?)] linkb: false

Hi,

I want to get the AMD Radeon 6550M working on my Laptop. I managed to install and start OSX. My Problem is now the native Resolution. I tried many kexts I found but nothing works. Can anyone help? VBios Dump and my DSDT extracted with AIDA64 are in the Attachment. I hope they are the right files.

No AtomBios signature found in this VBIOS. you probably have switchable graphics and your integrated GPU is not disabled. Can't help you.

can anyone help me?

Can you attach a file from IORegistryExplorer ?

Trucker MK · July 21, 2013

@ freeuer16

I tried the DisplayMergeNub.kext, it ~~still does not~~ inject my modified EDID (i can see in IOREg my original EDID) but i definitely see some improvement.

Without DisplayMergeNub.kext With DisplayMergeNub.kext

You can see here the gradients all over

the lower part on the X

Edit. I managed to inject the modified EDID with DisplayMergeNub.kext + Display Override file (DisplayVendorID and DisplayProductID in Display Overrides) but the result is the same. I would say that now we are from 16-bit color Pixel Depth to 24-bit color Pixel Depth, but not yet at 32-bit color Pixel Depth. I will do some more tests.

freeuser16 · July 21, 2013

Great news! If you see an improvement, then probably EDID is at least somehow injected. You probably just need a bit different "basic params" value than me.

Values from your original EDID:

80 26 15 78 0A

I think only the first and last bytes (80 and 0A) might have effect on gradients. 26 and 15 are dimensions of your screen (38 x 21 cm if you convert these numbers to decimal) and 78 is display gamma, but it was 78 on all EDIDs I have seen so far.

Trucker MK · July 21, 2013

I also used serial from MacBookPro and i did not replaced the Chroma info, i will try to change these and report back.

Trucker MK · July 21, 2013

@ freeuser16

Any suggestions for the "Basic Parameters" value? I will keep looking but this now is much better then it was before, maybe i can live with this.

Trucker MK · July 21, 2013

Do you have this at the end of the DarwinDumper Report?

EDID block does NOT conform to EDID 1.3!
	Missing monitor ranges
	Detailed block string not properly terminated

freeuser16 · July 21, 2013

Do you have this at the end of the DarwinDumper Report?
EDID block does NOT conform to EDID 1.3!
	Missing monitor ranges
	Detailed block string not properly terminated

Yes, I have both warnings. And you know what.. Adding those monitor ranges actually gave me gradients back, so I left it without them Don't know what's wrong with Detailed block string though, it looks correct to me.

@ freeuser16

Any suggestions for the "Basic Parameters" value? I will keep looking but this now is much better then it was before, maybe i can live with this.

As I said, you should try different values for the first and last byte, the middle ones are ok. It's a good idea to try something from Apple monitors:

iMac: B5 30 1B 78 22 => B5 26 15 78 22

MBP: A5 1D 12 78 02 => A5 26 15 78 02

Cinema HD: 80 40 28 78 2A => 80 26 15 78 2A

Thunderbolt: B5 3C 22 78 22 => Same as iMac

Led Cinema: A5 34 20 78 26 => A5 26 15 78 26

Trucker MK · July 21, 2013

OK thanks, i will try these, but later, i had enough for today .

freeuser16 · July 21, 2013

Wait, it might also depend on injected properties! I, for example, still have gradients with the same EDID if I enable the card with Clover graphics injector instead of DSDT (I use device-properties string, but it's the same). Thus you should also try basic params 90 26 15 78 0A + injection of the same properties as me. Except "AAPL00,override-no-connect" maybe, since this is my EDID injection. I attach plist file with these properties.

device-properties.plist.zip

Trucker MK · July 21, 2013

Thanks man, i will try this tomorrow. Now i am already in the bed, i need to be "up & running" tomorrow at 5 AM.

Trucker MK · July 22, 2013

I've made two quick tests, i added these strings to my DSDT ( these are relevant for the gradients issue). The result is the same.

                            "@0,display-link-component-bits", 
                            Buffer (0x04)
                            {
                                0x06, 0x00, 0x00, 0x00
                            }, 
                            "@0,display-pixel-component-bits", 
                            Buffer (0x04)
                            {
                                0x06, 0x00, 0x00, 0x00
                            }, 
                            "@0,display-dither-support", 
                            Buffer (0x04)
                            {
                                0x00, 0x00, 0x00, 0x00
                            }, 
                            "AAPL00,Dither", 
                            Buffer (0x04)
                            {
                                0x00, 0x00, 0x00, 0x00
                            },

I also tried all the strings you use but i get black screen.

EDIT. Except "AAPL00,override-no-connect" , i already tried some time ago but it did not inject the EDID.

Next thing i will try to add the string one by one and test with every new string added.

AMD Radeon HD 6650M / Graphics Enabler / DSDT / HDMI Audio / Acer Aspire 7750G - 2674G50Mnkk [Gradients Fixed]

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