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@Edhawk Ok, I tried adding patched DSDT, turned off igpu so I was able to boot with Mac Pro 6.1, but the result is the same. It does recognise my TV on both HDMI ports, even offers 4K resolution and the TV upon connecting shows at the bottom that it is getting 4k resolution, but the screen is...

All right, I’ll try what you suggested as soon as I get back to my hackintosh. These are some newbie mistakes I suppose. I remember some years ago I had patched DSDT, now I don’t. My bios version is F4, so I’ll install it for sure. Funny how now on Catalina I got two DPs working but not hdmi...

The IOReg readings were taken with that SSDT, didn't know that will mess up the readings. I can boot from my install USB that is without that SSDT and show you what I got if that helps. Ill remove NullCPUPowerMangement.kext in that case. I do have VirtualSMC.efi in Drivers/BIOS, I copied it to...

@Edhawk Ok, I followed you instructions and at least some things are a bit clearer. I'm using ASUS Dual series Radeon RX 580 8GB I'm connecting via far right DP now, viewed on this picture. I checked things out with IORegistryExplorer as you suggested, plugging and unplugging all ports. What I...

@Edhawk All right, FINALL some progress! Thanks man!! Both display ports are working now. HDMI ports unfortunately still don't work. When I connect 4K TV to HDMI it gets detected and I can move windows to that screen, but the screen looks like it is off, and graphics get laggy. Also connecting...

Thanks for sharing this, Ill try it as soon as I get back to may hackintosh. You already told me I don't need to set anything in config since I use Clover, except RadeonDeInit which is already checked, so that's that. I already have SSDT-SB-i7.aml in patched folder, do I keep both? And I you...

I have the ASUS rx580, which I didn't really see people mentioned. https://www.asus.com/Motherboards-Components/Graphics-Cards/Dual/DUAL-RX580-8G/ As far as the settings you mentioned I use the same and they work on Mojave. Ona Ctalina still black screen without whatevergreen, and with...

Yeah I feel that might be the problem. I didn't play with igpu much as I didn't even think that might be the issue. I covered my problem more extensively in that quote at the end of my previous post you've seen it. In Mojave the only igpu setting is under Devices, Fake ID, IntelGFX is set to...

Ok, thanks. I'll keep digging for solutions, because nothing so far works.

I have similar problem I think. What are your Clover settings regarding graphics do you have (do you use Orinico framebuffer with inject ATI, any kext patches, whatevergreen? I can't get past black screen, although booting from USB works good. Restarted million times as you did... and I...

Is this something that can help with my same problem as well on Catalina do you think? And when you say a corresponding entry for ssdt in config... is that "DSDT name" under Acpi in Clover, or where do I set that if you wouldn't mind explaining? This is my problem:

Thanks, I did try that multiple times, emptying the bin just in case

So my problem is, after installing Catalina (with EFI from Mojave copied to USB EFI, which is the thing that finally allowed me to finish installation without black screen), I ran Multibeast, installed kexts and setup config. But trying to boot from SSD results in black screen. I tried numerous...

I posted my solution for this problem on page 6 exactly a year ago for Mojave. Now I have the same problem with Catalina. I was wondering if someone more knowledgable can take a look if I'm doing something obviously wrong regarding me trying to get past the black screen with Asus rx580. I got...

Thanks for taking time to look into this. I'll try with another DP to hdmi cable or adapter and see how it goes.

Any other possible solutions come to mind knowing I do get to apple logo and progress bar? Or if you know a better thread where I can jump in, so I don't create another for this common problem. Thanks

Yes, I see the apple logo and the progress bar gets to about half or 2/3, and then I guess it loads the graphics driver and goes black, but I can hear the OS booted up fine. Without WEG i get some purple glitches across apple logo screen for a second, and than the screen goes black but turned...

Not sure what you're asking, when I power on the machine I have several seconds to press delete or F12 for BIOS settings or Boot drives options, after choosing to boot from SSD i briefly see "Loading OS" at the top left corner, than few seconds of black screen, and than I'm in the Clover menu...

Thanks for the detailed instructions regarding my Clover folder. Those extra files are copies from USB Efi, like I said I don't really know what I should and should not copy from USB, so thanks for clearing that out. I did install fresh Clover on SSD, drivers were in drivers/BIOS, and the rest...

Thanks for suggestions. My logic was also to try copying EFI from USB to SSD, so that was the first thing I tried. I tried again following what you said and cleaning NVRAM, but again the screen doesn't respond. I also tried modifying EFI after installing Clover on SSD. I copied missing kexts...