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Radeon Compatibility Guide - ATI/AMD Graphics Cards

Anybody familiar with this problem?.
Yes I’m aware that broadcasting your serial number for the whole world to see is not very clever. What on earth are you thinking?.
 
So i was able to get this working in my alienware laptop, only problem is that it only puts the video through the hdmi out and the laptop goes to a black screen. Ive been trying all kinds of things to get it working to no avail. Anybody familiar with this problem? Everything works great through hdmi, card is recognized properly, fans rev etc....
Heres a screenshot just in case anyone has seen this weirdness. It also happens booting into ubuntu but the screen comes back on

0415202237.jpg
 
I'm hitting a wall wth Catalina upgrade. I have a Sapphire Nitro+ RX590 that worked just fine with 10.14 but can't figure out the black screen after 10.15.4 upgrade.

What I have tried so far:
  • Upgraded Clover to 5112, also tried Multibeast 12.1.0 Catalina Edition (that downgraded Clover to 5107)
  • HDMI vs DP
  • Disabled onboard GPU in BIOS
  • Changed OS to Windows 8/10 and Windows 8/10 WHQL to disable CSM support
  • WEG 1.3.8 and Lilu 1.4.3 to EFI/C/k/O, various combination of injecting/not injecting/blocking kexts in Clover boot.
  • Clover boot in safe mode
  • Added SSDT-EC.aml
  • agdpmode=pikera
None of that helped so far, the furthest I get is Apple logo with progress bar, then temporary artifacts in form of purple lines and then black screen, seems like the port has the power because the backlight is on and display doesn't go to sleep.

What I have not tried:
  • Additional binary patches - I understand none are needed with Radeon cards
  • Changing system definition from iMac14,2 - I have no idea what else to try and what effect would it have
  • Flashing BIOS
  • Messing with /L/E or S/L/E - looks like EFI/C/k/O is the preferred method with Catalina anyways
I can boot with onboard Intel graphics (without acceleration but that's probably fixable), obviously that's not what I'm trying to get.


Please help me Obi Wan, you're my only hope
 

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Maybe Your bios' setting is wrong, try turning "internal graphics" on enabled
 
I'm hitting a wall wth Catalina upgrade. I have a Sapphire Nitro+ RX590 that worked just fine with 10.14 but can't figure out the black screen after 10.15.4 upgrade.

What I have tried so far:
  • Upgraded Clover to 5112, also tried Multibeast 12.1.0 Catalina Edition (that downgraded Clover to 5107)
  • HDMI vs DP
  • Disabled onboard GPU in BIOS
  • Changed OS to Windows 8/10 and Windows 8/10 WHQL to disable CSM support
  • WEG 1.3.8 and Lilu 1.4.3 to EFI/C/k/O, various combination of injecting/not injecting/blocking kexts in Clover boot.
  • Clover boot in safe mode
  • Added SSDT-EC.aml
  • agdpmode=pikera
None of that helped so far, the furthest I get is Apple logo with progress bar, then temporary artifacts in form of purple lines and then black screen, seems like the port has the power because the backlight is on and display doesn't go to sleep.

What I have not tried:
  • Additional binary patches - I understand none are needed with Radeon cards
  • Changing system definition from iMac14,2 - I have no idea what else to try and what effect would it have
  • Flashing BIOS
  • Messing with /L/E or S/L/E - looks like EFI/C/k/O is the preferred method with Catalina anyways
I can boot with onboard Intel graphics (without acceleration but that's probably fixable), obviously that's not what I'm trying to get.


Please help me Obi Wan, you're my only hope
I don't know if this will fix Your issue but try this:
--> Connect Your monitor via HDMI
if this won't work, try changing your SMBIOS from iMac14,2 to Mac Pro 6,1.

NOTE: Remember that, in case this fix won't work, for some reasons You could be not able to boot so try this fix ONLY IF YOU CAN BOOT VIA USB (using the USB that You used for the install), eventually You can re-change the SMBIOS version and try something else...
 
--> Connect Your monitor via HDMI
if this won't work, try changing your SMBIOS from iMac14,2 to Mac Pro 6,1.

HDMI definitely did not work but I was able to finally get it to boot with acceleration via DP. Here's what I did since I last posted:
  • Booted into single user mode and removed old Multibeast kexts from /L/E
  • Updated Clover to 5114
  • Incidentally stupid Windows 10 update wiped my Clover UEFI boot manager and I had to recreate it.
  • Latest WEG, Lilu, FakeSMC, ALC to EFI/C/k/O
  • Changed SMBIOS from iMac14,2 to iMacPro1,1
  • agdpmod=pikera (my previous post had it as agdpmode but I don't remember if I actually tried with e or without, probably doesn't matter anyways since WEG 1.3.8 should take care of it but who knows)
It's likely that SMBIOS version was the culprit, and your suggestion of MacPro6,1 probably would have worked too.

So far everything seems to be in a good shape and stable.
 
HDMI definitely did not work but I was able to finally get it to boot with acceleration via DP. Here's what I did since I last posted:
  • Booted into single user mode and removed old Multibeast kexts from /L/E
  • Updated Clover to 5114
  • Incidentally stupid Windows 10 update wiped my Clover UEFI boot manager and I had to recreate it.
  • Latest WEG, Lilu, FakeSMC, ALC to EFI/C/k/O
  • Changed SMBIOS from iMac14,2 to iMacPro1,1
  • agdpmod=pikera (my previous post had it as agdpmode but I don't remember if I actually tried with e or without, probably doesn't matter anyways since WEG 1.3.8 should take care of it but who knows)
It's likely that SMBIOS version was the culprit, and your suggestion of MacPro6,1 probably would have worked too.

So far everything seems to be in a good shape and stable.
Awesome!
 
Hi I did that and it still boot with Intel4000 but doesn't see the RX580 card. I tried only plugging the caed with HDMI cable. It boots my nothing shows up. its blank and doesn't seem that there is signal sending from the card. I see the fan and the power light is on.

Its driving me crazy here.
I had this issue with a second monitor (I have RX 580 too)
I fixed it changing SMBIOS version to mac pro 6,1

NOTE: Remember that, in case this fix won't work, for some reasons You could be not able to boot so try this fix ONLY IF YOU CAN BOOT VIA USB (using the USB that You used for the install), eventually You can re-change the SMBIOS version and try something else...
 
Have they fixed the Vega fan speed issue? I’m on Mojave.

I currently have a 590 with lilu/WTG installed. Wanting to do swap to a Vega 56. Which Vega 56 brand is the most compatible and would work out of the box without any fan issues?
I’m seeing buying guide says MSI air boost but not sure if it’s flawless compatibility?
 
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