[SeaBIOS] [Qemu-devel] seabios serial console vs. sgabios

[Paolo Bonzini]

On 02/11/2017 17:11, Daniel P. Berrange wrote:
> Historically libvirt will always use '-device sgabios' if the user has
> requested <bios useserial='yes'/>.  So if that -device arg is given, I
> think QEMU must honour it, which implies QEMU must disable Seabios'
> own built-in serial console impl in that scenario.

We should also change libvirt to produce

  -device sga            (if sga supported)
  -machine graphics=off  (if -machine graphics supported)

On old QEMU, -machine graphics=off will be ignored.  On new QEMU and/or
SeaBIOS, we should ensure that specifying both has the right effect.

Paolo