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

deeveedee · Oct 10, 2020

glebrand said:
Hi! Can't solve the black screen problem with Intel 630 (connection via HDMI).
Yesterday I've updated Lilu and Whatevergreen kexts but nothing has been changed.
See attached EFI

By "can't solve" I'm guessing you mean you don't know how to patch Intel UHD 630 graphics. You need Devices->Properties in your config.plist and you should not have those DSDT renaming patches in your config.plist. Take your time and study these:

Also search for your board / CPU and look for others who already have macOS running on your system.

piyuyi · Oct 12, 2020

Hi. I have managed to get the signal through HDMI from black screen in an asus maximus hero XI with opencore adding one of your profiles, but the image compared to the Displayport output is not so smooth and the mouse has a bit of lag.

Can you help me please?

Code:

   <key>Properties</key>
        <dict>
            <key>PciRoot(0x0)/Pci(0x2,0x0)</key>
            <dict>
                <key>AAPL,ig-platform-id</key>
                <data>
                BwCbPg==
                </data>
                <key>device-id</key>
                <data>
                mz4AAA==
                </data>
                <key>framebuffer-con0-busid</key>
                <data>
                AgAAAA==
                </data>
                <key>framebuffer-con0-enable</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con0-flags</key>
                <data>
                xwMAAA==
                </data>
                <key>framebuffer-con0-index</key>
                <data>
                AgAAAA==
                </data>
                <key>framebuffer-con0-pipe</key>
                <data>
                CgAAAA==
                </data>
                <key>framebuffer-con0-type</key>
                <data>
                AAgAAA==
                </data>
                <key>framebuffer-con1-busid</key>
                <data>
                BAAAAA==
                </data>
                <key>framebuffer-con1-enable</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con1-flags</key>
                <data>
                xwMAAA==
                </data>
                <key>framebuffer-con1-index</key>
                <data>
                AwAAAA==
                </data>
                <key>framebuffer-con1-pipe</key>
                <data>
                CAAAAA==
                </data>
                <key>framebuffer-con1-type</key>
                <data>
                AAgAAA==
                </data>
                <key>framebuffer-con2-busid</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con2-enable</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con2-flags</key>
                <data>
                xwMAAA==
                </data>
                <key>framebuffer-con2-index</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con2-pipe</key>
                <data>
                CQAAAA==
                </data>
                <key>framebuffer-con2-type</key>
                <data>
                AAQAAA==
                </data>
                <key>framebuffer-patch-enable</key>
                <data>
                AQAAAA==
                </data>
            </dict>
        </dict>

ALRA · Oct 18, 2020

update: i noticed that your cpu is i9-9900K. so my post won't work for you. you must read the framebuffer guide. No matter if you intend to use internal graphics, or is I undestand your RX card. I can't explain the framebuffer fix on here, you'll find a couple of very clear, step by step, exhaustive guides. focus on those....
Good luck. Let me know if I can help.

I finally realized that the CPU is not the same. Although I still have some problems, I have simply changed the connection of screens (I don't use HDMI anymore) and using DP (the 580 have 2xHDMI, 2x DP and 1 DVI (not usable because pink screen)), it works reasonably well using two screens, although it always starts in the secondary, when you access the system it changes automatically... and I won't touch anything else ;o)
Anyway thank you very much for your help, despite everything it has been very useful to me.

Tnx!

Armoured · Oct 19, 2020

This may be a dumb question but the instructions in post #1 say "DVI is the same as HDMI. The same BusIDs and even the same Type are used."

Does this mean that literally the exact same busid is used for DVI and HDMI in a single config.plist file (eg busid for both set as 0x01)? Or that the valid/functioning busids for dvi and hdmi need to be chosen from the limited group of valid busids for HDMI and DVI but distinct? (i.e. BusIDs 0x01, 0x02, 0x04, 0x06)

Experimenting with getting this gigabyte z390m (non-gaming) up and stable, and the combinations and permutations are taking a long time to get through. Thanks in advance.

rals2007 · Oct 20, 2020

Disregard

armik · Oct 24, 2020

piyuyi said:

Hi. I have managed to get the signal through HDMI from black screen in an asus maximus hero XI with opencore adding one of your profiles, but the image compared to the Displayport output is not so smooth and the mouse has a bit of lag.

Can you help me please?

Code:

   <key>Properties</key>
        <dict>
            <key>PciRoot(0x0)/Pci(0x2,0x0)</key>
            <dict>
                <key>AAPL,ig-platform-id</key>
                <data>
                BwCbPg==
                </data>
                <key>device-id</key>
                <data>
                mz4AAA==
                </data>
                <key>framebuffer-con0-busid</key>
                <data>
                AgAAAA==
                </data>
                <key>framebuffer-con0-enable</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con0-flags</key>
                <data>
                xwMAAA==
                </data>
                <key>framebuffer-con0-index</key>
                <data>
                AgAAAA==
                </data>
                <key>framebuffer-con0-pipe</key>
                <data>
                CgAAAA==
                </data>
                <key>framebuffer-con0-type</key>
                <data>
                AAgAAA==
                </data>
                <key>framebuffer-con1-busid</key>
                <data>
                BAAAAA==
                </data>
                <key>framebuffer-con1-enable</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con1-flags</key>
                <data>
                xwMAAA==
                </data>
                <key>framebuffer-con1-index</key>
                <data>
                AwAAAA==
                </data>
                <key>framebuffer-con1-pipe</key>
                <data>
                CAAAAA==
                </data>
                <key>framebuffer-con1-type</key>
                <data>
                AAgAAA==
                </data>
                <key>framebuffer-con2-busid</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con2-enable</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con2-flags</key>
                <data>
                xwMAAA==
                </data>
                <key>framebuffer-con2-index</key>
                <data>
                AQAAAA==
                </data>
                <key>framebuffer-con2-pipe</key>
                <data>
                CQAAAA==
                </data>
                <key>framebuffer-con2-type</key>
                <data>
                AAQAAA==
                </data>
                <key>framebuffer-patch-enable</key>
                <data>
                AQAAAA==
                </data>
            </dict>
        </dict>

hi. what is your system and processor? Starting from 10.14.4 - no need to change device-id. try to delete and check.

Qwinity · Oct 24, 2020

Hey guys been tooling around with the framebuffer this weekend trying to get my UHD630 graphics to work correctly, let me give some context first:

Asus Prime Z490-P
Intel 10100 (UHD630)
Running OC 0.6.1
Catalina 10.15.7
Let me know if you need more info of what I am using.

So my current setup works perfectly with multi monitor (note using no adapters, have HDMI and DP on my mobo and using those directly), I had an issue before with 4k on one of my monitors but I resolved that changing my SMBios to 20,1 instead of 19,1.

My main issue is that I need to hot plug the HDMI monitor every time I restart the PC (on login), or I just turn it off and back on again, basically the same thing. I want to fix that issue, is there a way. I know it was mentioned on the first post but if anyone knows some context around that I'd like to figure this out.

deeveedee · Oct 25, 2020

Qwinity said:
Hey guys been tooling around with the framebuffer this weekend trying to get my UHD630 graphics to work correctly, let me give some context first:
...
My main issue is that I need to hot plug the HDMI monitor every time I restart the PC (on login), or I just turn it off and back on again, basically the same thing. I want to fix that issue, is there a way. I know it was mentioned on the first post but if anyone knows some context around that I'd like to figure this out.

Without seeing your debug files, it's a guess - you may need igfxonln=1. See these boot args. If that doesn't help, post your debug files (include sanitized config.plist).

Qwinity · Oct 26, 2020

deeveedee said:
Without seeing your debug files, it's a guess - you may need igfxonln=1. See these boot args. If that doesn't help, post your debug files (include sanitized config.plist).

Will try tonight thank you for helping me out with this. I will post the debug files if it doesn't work.

Qwinity · Oct 27, 2020

deeveedee said:
Without seeing your debug files, it's a guess - you may need igfxonln=1. See these boot args. If that doesn't help, post your debug files (include sanitized config.plist).

So I tried some more stuff today, couple of things I tried:
Added igfxonln=1
Made some changes to hybrinateMode (set to zero)
Made some changes to other sleep functions
was trying different busIds (sadly only busId 2 worked for HDMI all others didn't even output)
Logged everything (did some lilu+WEG debugging but nothing that was interesting in the output)
Changed some bios parameters (made some changes on vram, nothing)

So all that didn't work so here is my log file + config.plist + ACPI files

// Sanity Check

https://opencore.slowgeek.com/?file=cometlake0626R4ZSa&rs=cometlake062

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

deeveedee

piyuyi

ALRA

Armoured

rals2007

armik

Qwinity

deeveedee

Qwinity

Qwinity

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