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

Joined
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MSI Z97 Gaming 7
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I've tried double clicking, it simply won't work! I'm baffled as to what could be the reason. I tried unlocking on the bottom left as well. Any thoughts?
Also when I used the export to bootloader config then checked in opencore configurator, it seemed aligned all correctly! The only issue now is the inability to edit the bus ID for some reason.

Opencore will read base64 or hex?
solved by double clicking and slightly dragging to the right, as if I'm highlighting. Oddly it doesn't work for me with a plain double click.
I did then go through all the possible bus IDs and get both outputs from the board set! Thanks for the guide! :headbang:
Solved the iGPU issue by patiently going through the steps here. Now something about that odd issue where audio only works when both outputs are plugged in...
 
Joined
May 19, 2017
Messages
70
Motherboard
MSI Z97 Gaming 7
CPU
4690K
Graphics
Sapphire Vega 56
Mac
  1. MacBook Pro
Mobile Phone
  1. Android
  2. iOS
MSI Z490-A Pro Connector patching listed here - used with i5 10600k - UHD 630, and no further patching via DeviceProperties in config.plist
Feel free to add in the OP or anywhere else.
 

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Joined
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X299-WU8
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i9-9880XE
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  2. Mac Pro
Hello @nmano,

Long time no see!

Comet Lake desktop platform IDs are:
  • Headless 0x9BC80003
  • Non-headless 0x3E9B0007
  • Big Sur supports Comet Lake iGPU device ID natively, so it's not necessary to specify device-id
    • I believe latest version of Catalina also supports this
    • However, if you need to specify device-id, it should be 0xC89B0000
Hi Friend
Thanks for Detail
I am waiting for that System.
I will test and replay soon.
 
Joined
Jan 15, 2012
Messages
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Gigabyte GA-Z370-HD3P
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i7-8700K
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GTX 1070
Hi, this patch has no effect on my iGpu.
Z390D
i7 9700k
8GB DDR4 Ram
HP Nvme SSD
OS Catalina 10.15.7

I have the screen overscan issue
rest all graphic acceleration works without issues
3q4mH2L.jpg
 

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CaseySJ

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Hi, this patch has no effect on my iGpu.
Z390D
i7 9700k
8GB DDR4 Ram
HP Nvme SSD
OS Catalina 10.15.7

I have the screen overscan issue
rest all graphic acceleration works without issues
3q4mH2L.jpg
What steps have you taken so far to try and fix the overscan issue?
 
Joined
Jan 15, 2012
Messages
57
Motherboard
Gigabyte GA-Z370-HD3P
CPU
i7-8700K
Graphics
GTX 1070
What steps have you taken so far to try and fix the overscan issue?
1.Checked the bios setting - Seems Proper
2. Used this guide to Patch. - Same result
3. Used SwitchResX - seems to work with underscan slider, but the display doesnt looks sharp at all.
 
Last edited:

CaseySJ

Moderator
Joined
Nov 11, 2018
Messages
14,762
Motherboard
Gigabyte Z490 Vision D
CPU
i5-10400
Graphics
RX 580
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  1. MacBook Air
  2. MacBook Pro
  3. Mac Pro
Classic Mac
  1. Quadra
Mobile Phone
  1. iOS
1.Checked the bios setting - Seems Proper
2. Used this guide to Patch. - Same result
3. Used SwitchResX - seems to work with underscan slider, but the display doesnt looks sharp at all.
Apologies for the late reply. Some questions and comments:
  • What is the name/model of the HP monitor?
  • Is it connected to computer via DP or HDMI cable?
  • Are there a video adapter being used such as DP to DVI, etc.?
  • If using straight DP to DP, is the monitor set to DP 1.1 or 1.2? It should be set to 1.1 first to see if the problem disappears. This can be done from the monitor’s on-board menu.
  • Are you using WhateverGreen to disable the nVidia GPU (-wegnoegpu)?
  • Is this a brand new build or did the overscan problem appear recently after months of normal operation?
 

CaseySJ

Moderator
Joined
Nov 11, 2018
Messages
14,762
Motherboard
Gigabyte Z490 Vision D
CPU
i5-10400
Graphics
RX 580
Mac
  1. MacBook Air
  2. MacBook Pro
  3. Mac Pro
Classic Mac
  1. Quadra
Mobile Phone
  1. iOS
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