Radeon Compatibility Guide - ATI/AMD Graphics Cards

[UtterDisbelief]

DisplayPort. 1920 x 1080. Going to try a boot argument called "agdpmod=pikera" in Clover Options... it's not in my config.plist. But I never needed it before...

[Edit, well agdpmod=pikera in the boot args area of Clover didn't work either, by itself or with other changes.]

Please stick to one thread with the problem, if you could, to avoid duplication of effort. I see you also have a discussion here for the same problem.

 

[wstrohm]

Please stick to one thread with the problem, if you could, to avoid duplication of effort.

Okay, I'll drop posting to this thread. There were some ideas here, though, that did not duplicate recommendations from the other thread, which I did try. No luck yet.

 

[ac9001]

Anybody know if the Radeon HD8970m will work with catalina? Thanks

 

[hitmanbg]

I think HD8970m is rebranded R9 M290. There are threads r9 290 working on Mojave so it should be possible to work on catalina too.

[Success] G4560/R9 290/ASUS Z170-P Mojave

So my specs are: Processor: Intel Pentium G4560 Graphics: Sapphire AMD Radeon R9 290 Tri-X 4GB Motherboard: Asus Z170-P Ethernet: Realtek RTL8168 RAM: Corsair LPX 2x4GB 2400MHz DDR4 Monitor: Dell P190S 19’ 1280x1024 Storage: Toshiba HDD Created bootable pen drive following UEFI Clover...

www.tonymacx86.com

 

[andyon]

Please help me
Main B365M D2V
i3 9100F
HD 7730 2G DDR5

 

[ac9001]

Anybody know if the Radeon HD8970m will work with catalina? Thanks

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....

 

[craighazan]

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?.

 

[ac9001]

ill change it

 

[ac9001]

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

 

[hammerhat]

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