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From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH] spice: add display & head options
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To: =?ISO-8859-1?Q?Marc-Andr=E9?= Lureau <marcandre.lureau@gmail.com>
Cc: qemu-devel@nongnu.org

  Hi,

>         The second way is a single display channel with a single, big
>         surface
>         for all heads.  Then -- with spice-agent help -- guest and
>         client
>         negotiate which region of the big display gets scanned out to
>         which
>         head.


> My understanding is that "head" will not work correctly with QXL (only
> head 0, but can be a multi-head QXL),

For the second way yes, because in that case "head" is a qxl/spice
private thing and not visible outside.  You'll see that for example in
case you try to screendump or connect with vnc.  No heads, only the big
surface.

cheers,
  Gerd