I built 6.2-rc2 with the patch applied. The same black screen problem 
happened with 6.2-rc2 with the patch. I tried to use early kdump with 
6.2-rc2 with the patch twice by panicking the kernel with sysrq+alt+c 
after the black screen happened. The system rebooted after about 10-20 
seconds both times, but no kdump and dmesg files were saved in 
/var/crash. I'm attaching the lspci -vvv output as requested.