From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:38123)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kraxel@redhat.com>) id 1Yk54B-0006hm-0N
	for qemu-devel@nongnu.org; Mon, 20 Apr 2015 02:20:23 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <kraxel@redhat.com>) id 1Yk541-0004cG-62
	for qemu-devel@nongnu.org; Mon, 20 Apr 2015 02:20:22 -0400
Received: from mx1.redhat.com ([209.132.183.28]:49683)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <kraxel@redhat.com>) id 1Yk540-0004bw-UW
	for qemu-devel@nongnu.org; Mon, 20 Apr 2015 02:20:13 -0400
Message-ID: <1429510807.12547.8.camel@nilsson.home.kraxel.org>
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 20 Apr 2015 08:20:07 +0200
In-Reply-To: <N1-8j3A71obEh@Safe-mail.net>
References: <N1-8j3A71obEh@Safe-mail.net>
Content-Type: text/plain; charset="UTF-8"
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] Multiple monitors
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: tom289332@Safe-mail.net
Cc: qemu-devel@nongnu.org

On Fr, 2015-04-17 at 12:45 -0400, tom289332@Safe-mail.net wrote:
> Hello,
> 
> What are the possible ways to use multiple monitors with qemu (running locally)?

> (I asked this on qemu-discuss last week, but got no responses, so I'm trying here.)
> 
> I read somewhere that spice supports multiple monitors. But I'm worried that 
> with spice being network-based, it won't be fast enough for video playback 
> (I've tried vnc, and it was too slow). Is it possible to have one monitor use 
> sdl and the other to use spice/vnc/anything?

For a multihead setup easiest is spice+qxl indeed.  virtio-gpu will be
able to do that too, but it isn't merged yet.

For multiseat see docs/multiseat.txt

> And I saw somewhere something about multiple monitors in sdl2, but I can't find 
> anything relevant in the manpage. Does sdl2 support multiple monitors?

Yes.  With sdl/vnc you can switch between monitors using hotkeys.  with
sdl2 you get a separate window.  gtk allows both (switching using
hotkeys or tabs, but also showing tabs as separate windows).

cheers,
  Gerd