[GUIDE] General Framebuffer Patching Guide (HDMI Black Screen Problem)

[jmmc]

I have the same problem and I am on 10.15.4
I am using iMac 19,2 with an i5 8400T UHD 630

<< Solved >> - Screen sleep stopped working after update to mac os Catalina 10.15.4

As haberda said, whatevergreen kext will fix the issue on (hopefully) the next release. I have tried a version that solved my problem (screen sleep, not system sleep).

www.tonymacx86.com

 

[nobin118960]

The guide in Post #1 is designed to help you find the solution for yourself. I don't have the Asus ROG B360m so I cannot solve this for you.

I have tried this guide but my understanding so poor.
i am facing the problem "could not register with frame buffer patch"
screen shot given below..
if I remove the patch then successfully boot with no acceleration (7mb graphics)
please sir help me out ....
also attached my efi folder..

 

[ModMike]

Nice guide!

 

[redde]

• #159

Hi, on Intel HD4600 I have two monitors, one on the HDMI port and the other on the DVI port. The update to 10.15.4 is successful only if I connect only the DVI monitor. Catalina works in dual display online if I connect the HDMI monitor after the system has started, otherwise KP and infinite reboot. 10.15.3 worked perfectly.
All the Kext are updated, Clover 5108. Any idea?

 

[ModMike]

@CaseySJ I am trying to support some of my IGPU users and want to create as unified an EFI so I don't have to remember to do anything other than change SMBIOS when posting.

If I fix and limit connectors to 2, will it affect anything if I put the patch it in my my headless config? I am hoping it will just be ignored because of headless mode and I only have to change SMBIOS when creating the IGPU-EFI.

 

[CaseySJ]

@CaseySJ I am trying to support some of my IGPU users and want to create as unified an EFI so I don't have to remember to do anything other than change SMBIOS when posting.

If I fix and limit connectors to 2, will it affect anything if I put the patch it in my my headless config? I am hoping it will just be ignored because of headless mode and I only have to change SMBIOS when creating the IGPU-EFI.

I think that should be fine because Platform ID supersedes everything else. If Platform ID is for a headless configuration, then macOS should ignore any and all connector settings...

 

[CaseySJ]

I have tried this guide but my understanding so poor.
i am facing the problem "could not register with frame buffer patch"
screen shot given below..
if I remove the patch then successfully boot with no acceleration (7mb graphics)
please sir help me out ....
also attached my efi folder..

Please try the attached config.plist.

 

[ModMike]

I think that should be fine because Platform ID supersedes everything else. If Platform ID is for a headless configuration, then macOS should ignore any and all connector settings...

That what I was hoping, will try it out and update the thread.

Thanks!

 

[ModMike]

I think that should be fine because Platform ID supersedes everything else. If Platform ID is for a headless configuration, then macOS should ignore any and all connector settings...

@CaseySJ How do I change the bus IDs? I can't seem to edit them. Do I need to add flags to change them? How can I validate what the proper flag settings should be?

Thanks!

 

[CaseySJ]

@CaseySJ How do I change the bus IDs? I can't seem to edit them. Do I need to add flags to change them? How can I validate what the proper flag settings should be?

Thanks!

We can change BusID by doing a single click on the item, as shown: