I imagine you'd post v3 with the update Gerd requested for the debug level(s), and then I'd respond with my R-b. (Obviously I'm not a SeaBIOS maintainer so that'll not be "decisive" by any means.)
Oh, BTW, I am considering, if only dismatch vendor-id stands for "non-qemu bridge" or dismatch both vid and did? I guess I need change both.
Yes, only the vendor id. If you found a pci bridge with redhat vendor id you know it's qemu.
cheers, Gerd