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X99 OC 0.5.7 Catalina 10.15.4 RX480 black Screen


ekwipt
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Hi,

 

I'm getting black screen after boot the shutdown during installation (can install on my SSD), screen goes black for 10 mins and then shutsdown. When i start back up i belive it's going through the 2nd install part of the installation but i can't see anything.

 

I went through a similar thing with clover when i installed 10.13.6 ages ago, i think it was fixed with VegaGraphicsFixup.kext which isnt used anymore for OC.

I have tried (-v debug=0x100 slide=128 keepsyms=1 npci=0x2000 agdpmod=vit9696 alcid=1) and without agdpmod=vit9696 but still black screen, i'm using Display Port on my RX480. I've searched but can't find any solution! Whatevergreen and Lilu latest as well. 
 

working EFI without credits.zip

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I never hear of agdpmod=vit9696, I am using the one below, without it black screen will happen on Radeon cards. give it a try and report back.

 

agdpmod=pikera

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On 6/1/2020 at 3:55 AM, vinnytwice said:

@ekwipt can you please share what fixed it? I have an rx-580 and when booting to Catalina I get Black screen too.. booting with agdpmod=pikera didn't help

Thank you

-v debug=0x100 dart=0 slide=128 keepsyms=1 npci=0x2000

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