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Re: [Qemu-devel] Why is SeaBIOS used with -kernel?

From: Richard W.M. Jones
Subject: Re: [Qemu-devel] Why is SeaBIOS used with -kernel?
Date: Fri, 1 Apr 2016 09:57:34 +0100
User-agent: Mutt/1.5.20 (2009-12-10)

On Fri, Apr 01, 2016 at 10:51:31AM +0200, Paolo Bonzini wrote:
> On 01/04/2016 10:47, Richard W.M. Jones wrote:
> > It's so we can handle error reports.  When someone reports that
> > libguestfs "hangs", it's sometimes useful to know if the BIOS was
> > entered or not, since it points the finger at either qemu, BIOS or
> > kernel.  (Remember we have to be able to run on a whole variety of
> > Linux distros which often have old/broken/random qemu/bios/kernel).
> Sure, but that can be an extra option if sgabios adds overhead.
> Anyhow, you probably want "-vga none" too.

That's the qemu option?  Currently we use
  -nodefconfig -nodefaults -display none
which I assumed would do the same thing (ie. not add any default
devices).  Does -vga none do more than this?


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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