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

[salsaweb]

But... the only port that works is the one with the dp to hdmi adapter, while the direct hdmi port doesn't work (really confused...)

 

[CaseySJ]

But... the only port that works is the one with the dp to hdmi adapter, while the direct hdmi port doesn't work (really confused...)

This is why I strongly advise against using any adapters during the test/setup procedure because it leads to a lot of confusing information in the IOReg file.

I think a lot of confusion will disappear if you just use straight DP-to-DP, HDMI-to-HDMI, and DVI-to-DVI cables that connect directly to a monitor that can receive DP, HDMI, and DVI signals directly.

 

[salsaweb]

Making some tests I think I understood the problem.
The second monitor has no hdmi but dvi input, and is connected to the system with a dvi to hdmi adapter and then connected to the hdmi port of the motherboard, the third monitor has instead only VGA output where a VGA to HDMi adapter is placed and is connected to the card with a DVI to HDMI adapter.
Tomorrow I buy direct cables and try everything again. Thank you very much for helping me, and sorry for the time I made you lose. Thank you!

 

[CaseySJ]

Making some tests I think I understood the problem.
The second monitor has no hdmi but dvi input, and is connected to the system with a dvi to hdmi adapter and then connected to the hdmi port of the motherboard, the third monitor has instead only VGA output where a VGA to HDMi adapter is placed and is connected to the card with a DVI to HDMI adapter.
Tomorrow I buy direct cables and try everything again. Thank you very much for helping me, and sorry for the time I made you lose. Thank you!

With "apples" to "apples" cables, please try the config.plist files again and capture the IORegistryExplorer file with each one. This file contains important information about av-signal-type and connector-type that can be used to determine the correct patch configuration. Feel free to post your results and the IOReg files.

Meanwhile, I've updated the Procedure section of the Guide as follows:

 

[wado729]

The only other thing I can think of is the Clover version running on the Mojave SSD. You may want to try using the same version that was running under 10.14.3 or updating to the latest...

In order to update to 10.14.4, I had to update clover to the latest version. Thanks.

 

[zzmadd]

It would be best to start a new thread in the Mojave Desktop Support forum where other Asus owners may be able to help. You should of course describe the problem, the steps taken so far, the partial results (20 successful hours with HFS+), the version of Mojave, the make/model of the NVMe drive, any USB or PCIe devices in the system, etc.

I had created a thread in Mojave Desktop Support but none replied.
Anyway, I seem to have it working now.

I eventually switched back to Bios 1.1, which is the first for this ASRock Motherboard.
I had no crashes in 48 hours. The system is working nicely I have to say.
My Config.plist has the Bios patch that was required to boot Bioses 1.2, 1.5 and 4.0. Can such bug in the Bios be the source of my issues?

The framebuffer patch is working nicely BUT I experienced an occasion in which Display Port suddenly stopped working with 60Hz in 4k and scaled back MacOS interface to a lower resolution after sleep.
With the Gigabyte Z370N WiFi motherboard and the very same i3 CPU I had huge trouble with 4k 60Hz. No matter what, even though the board had HDMI 2.0 and Display Port, the image was flickering at 60Hz. At times using Display Port the image was flickering in the Bios as well. Gigabyte support said some of these limitations lays with some Intel CPUs.

 

[salsaweb]

Right now I have connected only one HDMI to HDMI direct monitor.
I attach IOReg file.
ps: Tomorrow I try to connect the second monitor with a direct DVI to DVI cable, and let you know

 

[wado729]

Updated to 10.14.5 beta 4 and it looks like all graphical issues are fixed. Booted with successfully with both monitors connected.

 

[zzmadd]

It would be best to start a new thread in the Mojave Desktop Support forum where other Asus owners may be able to help. You should of course describe the problem, the steps taken so far, the partial results (20 successful hours with HFS+), the version of Mojave, the make/model of the NVMe drive, any USB or PCIe devices in the system, etc.

Nono now it has become a reboot and it only happens when I watch videos. For now 4k videos. When watching, after a while the PC freezes and after a few seconds reboots.

 

[CaseySJ]

Nono now it has become a reboot and it only happens when I watch videos. For now 4k videos. When watching, after a while the PC freezes and after a few seconds reboots.

Just replied to your thread in Post Installation —> General Help.