Black Screen (can not boot) after replacing NVidia with AMD HD7850

[sdancer75]

Short story. My old High Sierra works just fine with NVidia 9800Gtx on SSD1. Trying to upgrade to Catalina I had no acceleration with NVidia Card. So, installed a fresh copy of Catalina on SSD2 and I Installed and AMD HD7850 (https://www.msi.com/Graphics-card/R7850-1GD5OC/Specification) video card. 

 

The result? None of them can boot, it shows a black screen whatever I tried. When I connect my monitor thru HDMI the monitor stays in Green but black screen, when I connect thru DVI the monitor goes to standby (orange led). The ONLY way to run both OS is re-install my NVidia Card.

 

I tried almost anything that I know using Clover 5119, ie agdpmod=pikera, -x, nv_disable=1, inject ATI. I tried also an older version of clover, the same. Whatevergreen+Lilu are installed inside the Clover.

 

My MotherBoard is pretty old Asus P5KPL-AM SE LGA775 with quad core Intel CPU.

 

I can not think anything else. I read that Catalina to enable the AMD video cards, need CPUs that support SSE4.2 (mine is SSE4.1) and for that reason I should use the MouSSE kext emulator (https://forums.macrumors.com/threads/mp3-1-others-sse-4-2-emulation-to-enable-amd-metal-driver.2206682/). Maybe this is true, but High Sierra should run without problems, am I correct? Clover/Graphics detected my card as "Card Device=6819, Model=AMD Radeon HD 7850"

 

Using my High Sierra installation on SSD1 (APFS format) I can not get into safe mode because the IOATAFAMILY.KEXT is disabled and I can not see the SSD, as a result I get the prohibition sign

 

Can someone help? If I buy a used a supported Nvidia GTX710 will work with Catalina or even BigSur?

 

 

 

 

Edited May 17, 2023 by sdancer75

[Slice]

Yes, AMD HD7xxx after High Sierra requires MouSSE else black screen.

GTX710 will be supported up to Monterey.

[sdancer75]

3 hours ago, Slice said:

Yes, AMD HD7xxx after High Sierra requires MouSSE else black screen.

GTX710 will be supported up to Monterey.

I already have installed MouSSE under /Library/Extensions but I still get black screen. I suspect that my 7850 is incompatible with High Sierra or Catalina. 

[Slice]

Compatible but not with Core2Duo.

MouSSE is not open source so we can't check it or improve.

[sdancer75]

This is my GPU Bios Rom. I connect my monitors with HDMI and DVI. Looking at the ROM description below, I can see that the 1st connector is the DisplayPort. Does this mean that the output is going thru DP and because of this, I always get the black screen to my HDMI or DVI connectors? If yes, is there any way to change this?

 

 

ATOM BIOS Rom:
        SubsystemVendorID: 0x1462 SubsystemID: 0x2733
        IOBaseAddress: 0x0000
        Filename: V273BG.E01
        BIOS Bootup Message:
113-MSITV273MS.170 C40304 PITCAIRN PRO A1 GDDR5 32MX32 1GB
PCI ID: 1002:6819
Connector at index 0
        Type [@offset 44914]: DisplayPort (10)
        Encoder [@offset 44918]: INTERNAL_UNIPHY2 (0x21)
        i2cid [@offset 45024]: 0x90, OSX senseid: 0x1
Connector at index 1
        Type [@offset 44924]: DisplayPort (10)
        Encoder [@offset 44928]: INTERNAL_UNIPHY2 (0x21)
        i2cid [@offset 45051]: 0x91, OSX senseid: 0x2
Connector at index 2
        Type [@offset 44934]: HDMI-A (11)
        Encoder [@offset 44938]: INTERNAL_UNIPHY1 (0x20)
        i2cid [@offset 45078]: 0x92, OSX senseid: 0x3
Connector at index 3
        Type [@offset 44944]: DVI-I (2)
        Encoder [@offset 44948]: INTERNAL_UNIPHY (0x1e)
        i2cid [@offset 45115]: 0x95, OSX senseid: 0x6
Connector at index 4
        Type [@offset 44954]: DVI-I (2)
        Encoder [@offset 44958]: INTERNAL_KLDSCP_DAC1 (0x15)
        i2cid [@offset 45115]: 0x95, OSX senseid: 0x6