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Re: [Qemu-devel] seabios serial console vs. sgabios

From: Paolo Bonzini
Subject: Re: [Qemu-devel] seabios serial console vs. sgabios
Date: Thu, 2 Nov 2017 17:13:28 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

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.


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