Opencore 0.6.2 success with Big Sur but it always boots with black screen

[Wei Yang]

Hi all, my Opencore 0.6.2 Big Sur beta 10 boots all the time but its always starts with black screen.

I know it because when I press the keyboard, there are sound made for typing (even VoiceOver works CMD+F5, see video below)

When I start frustrating and spam typing, the screen glitches and woolaa the screen shows up. But sometimes it can be really hard to "trigger the glitches" and will continue to stuck at black screen or blank screen after boot. (It happens on every boot TT)
ASRock B450 Pro4 Motherboard
AMD Ryzen 7 2700
Pioneer 128GB SSD SATA
Sapphire Nitro+ RX5700XT
EFI : https://drive.google.com/drive/folders/1Lzlhqz_LYyRgB4MMjgorUMRRl_wK3_uT?usp=sharing

Video :

 

[MaLd0n]

agdpmod=pikera is done?

[Wei Yang]

1 hour ago, MaLd0n said:

agdpmod=pikera is done?

yeap, its added with whatevergreen

[MaLd0n]

try other video output

[Wei Yang]

I am originally using HDMI and it happens to be like that. When I try DP, its completely no signal from my monitor.

I just curious why the screen will suddenly appear when I spamming my keyboard LOL

Edited November 2, 2020 by Wei Yang

[MaLd0n]

reset nvram?

[Wei Yang]

10 hours ago, MaLd0n said:

reset nvram?

yeap tried multiple times... still the same... i guess i should try out 0.6.3 ?

[MaLd0n]

yes

https://filebin.net/a3093f5x3aceuywd/OpenCore-0.6.4-RELEASE.zip?t=3zvw8dhl

[Wei Yang]

tried... still no luck though... i suspect there are maybe 2 solution of this issue.

1. framebuffer patching (i not sure what is this but i saw ppl doing it)

2. BIOS update? I never update my BIOS before and curious whether doing it helps..

Do you have an insights?

[MaLd0n]

no idea