HDMI should plug out and plug in after boot

[developerhendy]

My Hackintosh Build :

- Gigabyte Z390 Aorus Pro wifi.
- intel Core i9-9900K
- Samsung Evo Plus 512 SSD.


I followed the Guide [GUIDE] General Framebuffer Patching Guide (HDMI Black Screen Problem) and my intel iGPU now working well
except that after boot login page appear for 1s or 2s [looks like normal] then it showed a black screen with no HDMI signal
and I had to plug cable out then plug in again no matter if I plugged in from screen side or MoBo side it shows the content after plug in again and everything work like normal with full acceleration and this is about my mac

this happened when computer go sleep too I have to plug out and plug in again to work

you can find my EFI Folder in Attachments

Thanks

 

[developerhendy]

@CaseySJ @headkaze
can you help me?

 

[CaseySJ]

@CaseySJ @headkaze
can you help me?

I am pleasantly surprised to see that HDMI port is working on Catalina 10.15.5 even though you have hot plug the cable!

What is the make/model of your monitor?

Are you using HDMI-to-HDMI cable? (No adapters?)

 

[developerhendy]

I am pleasantly surprised to see that HDMI port is working on Catalina 10.15.5 even though you have hot plug the cable!

What is the make/model of your monitor?

Samsung S22D390

it's old one and i am intend to replace it soon.
Can it be the problem ?

Are you using HDMI-to-HDMI cable? (No adapters?)

Yes, No Adapters.

 

[CaseySJ]

...
it's old one and i am intend to replace it soon.
Can it be the problem ?
...

Actually you have me baffled because it seems on-board HDMI does work with Catalina. Will run some tests on my end over the next or two to see if I experience the same issue with regard to hot-plug (if I can get HDMI to work at all).

 

[slim.jim]

Actually you have me baffled because it seems on-board HDMI does work with Catalina. Will run some tests on my end over the next or two to see if I experience the same issue with regard to hot-plug (if I can get HDMI to work at all).

I am not using on board HDMI but I am using HDMI from my RX 5700 XT @ 4K60. When I first installed it I had to do the HDMI plug out / plug in after sleep and on reboot. My issue ended up being in the display settings. When I turned off UHD color and put it in RGB mode all of the problems went away. The issue for me was specifically being set in UHD color. I loose HDR but with RGB mode I still get 4:4:4 chroma. If I swap to a DisplayPort 1.4 to HDMI 2.0 adapter then I am able to use UHD color.

 

[developerhendy]

I am not using on board HDMI but I am using HDMI from my RX 5700 XT @ 4K60. When I first installed it I had to do the HDMI plug out / plug in after sleep and on reboot. My issue ended up being in the display settings. When I turned off UHD color and put it in RGB mode all of the problems went away. The issue for me was specifically being set in UHD color. I loose HDR but with RGB mode I still get 4:4:4 chroma. If I swap to a DisplayPort 1.4 to HDMI 2.0 adapter then I am able to use UHD color.

where I can find the display settings you mean?
can I don this and fix the problem for on-board HDMI too?

 

[slim.jim]

where I can find the display settings you mean?
can I don this and fix the problem for on-board HDMI too?

It would be in the monitors OSD settings. For me I use a Vizio M Series 4K and it is in the settings.