Comment # 10 on bug 976250 from Gary Ching-Pang Lin

(In reply to sd fs from comment #8)
> Created attachment 676904 [details]
> debug.log with device_model_args = ...
> 
> > device_model_args = ["-debugcon", "file:debug.log", "-global", "isa-debugcon.iobase=0x402"]
> 
> debug.log after adding that line ...

I didn't find anything wrong in the log :-(

What if you add this line?

bios_override='/usr/share/qemu/ovmf-x86_64.bin'