MP 7,1 Boot screen on 7.1 with aftermarket GPU

[flowrider]

Alas, I have lost my boot screen I changed my LG 4K display to the LG UltraFine display with a BT (USB 3) input. I'm using a Monoprice BiDirectional USB 3 to DisplayPort cable. All works fine, except no more boot screen. I tried the Moshi cable also, and had the same results. So I had a boot screen with DP to DP but not with DP to USB 3 Really stumped

Lou

 

[UmarOMC]

Did your Radeon VII has the original ROM? Any changes to the firmware will make the signing invalid and the UEFI GOP is not loaded at boot time. You need the original ROM for pre-boot configuration support to work.

I did nothing to the ROM

 

[Stairway]

I've got a stock Radeon VII in my machine --- I get the boot screen, including the boot/drive selector screen when I want that. My connection is Displayport-Displayport.

 

[startergo]

I did nothing to the ROM

It looks like at some point Radeon VII was missing GOP:

AMD Outs UEFI-ready Video BIOS for Radeon VII, Company Promises One-click Updater

As a follow-up to our story from Monday about AMD missing out UEFI BIOS support for its Radeon VII graphics cards, AMD has come out with a quick response. The company in a statement said that it is ready with a UEFI-ready video BIOS for the Radeon VII, and has released the BIOS to its partners...

www.techpowerup.com

Asrock vBios is the same as Radeon's own which is no longer available on the AMD website, but you can find the Asrock vbios here:

ASRock Radeon VII VBIOS

16 GB HBM2, 808 MHz GPU, 1000 MHz Memory

www.techpowerup.com

Make sure that the DeviceID is the same. Also check your vbios if GOP is there:

Parsing the ASRock BIOS ROM file through a hex editor lets us see telltale signs of UEFI support, including the GOP micro-driver. Please pay attention to the highlighted UEFI-magic, which, when read in Intel byte-order, becomes "0EF1" aka "UEFI" in leetspeak. This magic sequence of bytes tells the rest of the system that the BIOS on this specific device reports that it supports the UEFI standard. :

 

[UmarOMC]

So only ASRock and direct from AMD Radeon VIIs get boot screen? 🤔 Does ASRock ship with that VBIOS or I'd have to find some way to flash it on a Wintel PC? Thanks.

 

[h9826790]

So only ASRock and direct from AMD Radeon VIIs get boot screen? 🤔 Does ASRock ship with that VBIOS or I'd have to find some way to flash it on a Wintel PC? Thanks.

No, all Radeon VII should able to produce boot screen via GOP. However, AFAIK, some early production Radeon VII shipped with broken GOP in the firmware, AMD release an updated ROM to fix that later on.

That ASRock Radeon VII has nothing special, just with the newer VBIOS. You can see the list of Radeon VII's ROM here.

TechPowerUp

Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.

www.techpowerup.com

Basically only two versions, and the brand makes no difference. Always that two versions. My understanding, the newer one should work (and that's why my XFX Radeon VII has). You can flash any Radeon VII with any of those ROM, all Radeon VII are reference cards. If you believe your Radeon VII still with the broken GOP, you can flash it with the newer ROM.

 

[UmarOMC]

Nice, I'll keep it then. Thanks.

 

[CMMChris]

All Radeon VIIs have been shipped without UEFI / GOP support in the beginning. All cards got an updated VBIOS that fixed it. You can flash any VBIOS update of any manufacturer to any Radeon VII. Those cards are all the same.

 

[UmarOMC]

Can this be accomplished via Linux? I'd rather get another drive for my Hackintosh and install Linux than use Windows and I don't have time or know people with computers competent enough to accomplish VBIOS flashing.

OR can I somehow do this by installing it in another PCIe slot in my MacPro without BootCamp?

 

[UmarOMC]

Here's something promising as far as VBIOS flashing via Linux. AMD Forum reference. Hope to get my Radeon VII back into my 7,1 soon.

 

[zozomester]

No, all Radeon VII should able to produce boot screen via GOP. However, AFAIK, some early production Radeon VII shipped with broken GOP in the firmware, AMD release an updated ROM to fix that later on.

That ASRock Radeon VII has nothing special, just with the newer VBIOS. You can see the list of Radeon VII's ROM here.

TechPowerUp

Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.

www.techpowerup.com

Basically only two versions, and the brand makes no difference. Always that two versions. My understanding, the newer one should work (and that's why my XFX Radeon VII has). You can flash any Radeon VII with any of those ROM, all Radeon VII are reference cards. If you believe your Radeon VII still with the broken GOP, you can flash it with the newer ROM.

Do you have Bootscreen on your Mac Pro 5.1 with Radeon VII? Which Rom do you have? Thank you!

 

[h9826790]

Do you have Bootscreen on your Mac Pro 5.1 with Radeon VII? Which Rom do you have? Thank you!

Yes, here is the demo

I use the ROM shipped with my card, but that's nothing special. Still the same version that you can dowbload from TechPowerUp.

 

[zozomester]

Yes, here is the demo

I use the ROM shipped with my card, but that's nothing special. Still the same version that you can dowbload from TechPowerUp.

Thanks for the reply! Good, but because of Opencore, there is only a Boot screen. No?
With Opencore, every GPU gives a Boot screen.