AMD 7790

[francescophp]

Hi! I have just installed yosemite and i have white screen when i boot

It boots only with -x

I Know that is a gpu problem, but i saw that my gpu may have work oob, why not?

I have to modify framebuffer? I don't have a displayport so use hdmi

Anyone know how i can do? Yosemite recognise my gpu as amd radeon 8xxx (1024mb)

[kvonlinee]

Try AtiConfig=Bonaire

[francescophp]

Try AtiConfig=Bonaire

I don't think that is this the problem but i'm going to try

 

In baladi framebuffer there are only framebuffer for DisplayPort.. If i buy it (dp to hdmi) may could change something? I don't want spent 30 € uselessly

[kvonlinee]

It is hard to tell about adapter. I have 7950, tried few frame buffer, 1. HDMI, 1 DVI, and result some time just one monitor, some time no monitor but on share screen it show 2 monitor all the time. Until I got the working one it show both monitor connect to have picture.

[francescophp]

It is hard to tell about adapter. I have 7950, tried few frame buffer, 1. HDMI, 1 DVI, and result some time just one monitor, some time no monitor but on share screen it show 2 monitor all the time. Until I got the working one it show both monitor connect to have picture.

If i edit frame buffer maybe can solve problem?

[kvonlinee]

If i edit frame buffer maybe can solve problem?

I don't know much about edit the frame buffer, but I read they edit connector, some works. I try to edit the frame buffer, I got lost.

So if you have time, give it a try.

[francescophp]

My gpu bios (Use 2 different bios decoder)

ATOM BIOS Rom: 
	SubsystemVendorID: 0x174b SubsystemID: 0xe253
	IOBaseAddress: 0x0000
	Filename: 253X03H0.S47
	BIOS Bootup Message: 
C58203 Bonaire XT A1 GDDR5 1GB 64Mx32 300e/150m                             

PCI ID: 1002:665c
Connector at index 0
	Type [@offset 43606]: DisplayPort (10)
	Encoder [@offset 43610]: INTERNAL_UNIPHY2 (0x21)
	i2cid [@offset 43716]: 0x90, OSX senseid: 0x1
Connector at index 1
	Type [@offset 43616]: HDMI-A (11)
	Encoder [@offset 43620]: INTERNAL_UNIPHY2 (0x21)
	i2cid [@offset 43743]: 0x92, OSX senseid: 0x3
Connector at index 2
	Type [@offset 43626]: DVI-D (3)
	Encoder [@offset 43630]: INTERNAL_UNIPHY1 (0x20)
	i2cid [@offset 43770]: 0x93, OSX senseid: 0x4
Connector at index 3
	Type [@offset 43636]: DVI-I (2)
	Encoder [@offset 43640]: INTERNAL_UNIPHY (0x1e)
	i2cid [@offset 43807]: 0x95, OSX senseid: 0x6
Connector at index 4
	Type [@offset 43646]: DVI-I (2)
	Encoder [@offset 43650]: INTERNAL_KLDSCP_DAC1 (0x15)
	i2cid [@offset 43807]: 0x95, OSX senseid: 0x6

——

C58203 Bonaire XT A1 GDDR5 1GB 64Mx32 300e/150m                             

Subsystem Vendor ID: 174b
       Subsystem ID: e253
Object Header Structure Size: 355
Connector Object Table Offset: 48
Router Object Table Offset: 0
Encoder Object Table Offset: fd
Display Path Table Offset: 12
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 [12] which is [HDMI_TYPE_A]
	encoder obj id [0x21] which is [INTERNAL_UNIPHY2 (osx txmit 0x22 [duallink 0x2] enc 0x5)] linkb: true
Connector Object Id [4] which is [DVI_D]
	encoder obj id [0x20] which is [INTERNAL_UNIPHY1 (osx txmit 0x11 [duallink 0x1] enc 0x2)] linkb: false
Connector Object Id [2] which is [DVI_I]
	encoder obj id [0x1e] which is [INTERNAL_UNIPHY (osx txmit 0x10 [duallink 0x0] enc 0x0)] linkb: false
Connector Object Id [2] which is [DVI_I]
	encoder obj id [0x15] which is [INTERNAL_KLDSCP_DAC1 (osx txmit 0x00 enc 0x10?)] linkb: false

It boots only in safe mode 

 

[francescophp]

My question is.. If i buy display port to hdmi converter.. For yosemite is the same as use a displayport to displayport?

 

Ps: i tried use dsdt using rampagedev guide but when i boot i see black screen..

[kvonlinee]

My question is.. If i buy display port to hdmi converter.. For yosemite is the same as use a displayport to displayport?

Ps: i tried use dsdt using rampagedev guide but when i boot i see black screen..

Not sure.