R9 270 Slow Boot

[daniesy]

Hey guys, i've taken a shot at installing Mojave. Everything seems fine, except the Graphics part. I've tried 2 things to get my old R9 270 to work:

1. Add my device id 0x68111002 to AMD7000Controller.kext, AMDRadeonX4000.kext and AMDRadeonX4000HWServices.kext. I rebuild caches with KextUtility and after the restart, i get no login screen. It gets stuck in verbose. If i tap the keyboard i can hear and error sound like i was on the login screen, but there's no graphics, just verbose text. This technique used to work on High Sierra.

2. I tried injecting a supported device id (0x68101002) with clover. This works, I get video acceleration and the GPU is correctly identified in System Information, but it takes 30+ seconds to get to the login screen after everything was loaded.

Do you have any hints or suggestions on what to do next?
Thanks!

 

[Khaibit]

Have you tried Lilu and Whatevergreen instead of patching core OS kexts?

 

[daniesy]

Thanks for you answer Khaibit!

Well I had them installed, but I wasn't where to go from there. Nothing happened, my card was not recognized, so i removed WhateverGreen. Lilu is still installed.

 

[daniesy]

I like the injecting the fake device id and Injecting ATI idea. I don't understand why it takes so long to boot with this method. This happened in High Sierra too. I must be doing something wrong..