On Thu, Nov 02, 2017 at 05:04:20PM +0100, Gerd Hoffmann wrote:
Hi,
One problem we have with the serial console support in seabios and sgabios: It can happen that both are activated. We'll go fix that in qemu, but that'll work for new qemu versions only, not for the old already released ones.
So I think it would be useful if seabios makes sure sgabios and serial console are not both active at the same time, i.e. in case we find "vgaroms/sgabios.bin" being present either turn off builtin serial console, or don't load sgabios (and possibly also enable builtin serial console).
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.
Regards, Daniel