can't boot just: serial0 console

hi,
after i try to merge centos and fedora kvm-36 spec files and patches (ethernet qemu fix etc) and start the guests on the new kvm host the guest install. the only thing what i got in qemu vnc window:
serial0 console
so the guest not even start to boot.
anybody has any tip?
may be the bios update? or?

  Levente                               "Si vis pacem para bellum!"

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