From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MWTte-0004TT-Qy for qemu-devel@nongnu.org; Thu, 30 Jul 2009 07:34:06 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MWTtZ-0004Pd-Fz for qemu-devel@nongnu.org; Thu, 30 Jul 2009 07:34:05 -0400 Received: from [199.232.76.173] (port=52198 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MWTtY-0004PL-VL for qemu-devel@nongnu.org; Thu, 30 Jul 2009 07:34:01 -0400 Received: from mx20.gnu.org ([199.232.41.8]:30662) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MWTtY-0006VS-Fq for qemu-devel@nongnu.org; Thu, 30 Jul 2009 07:34:00 -0400 Received: from mail.codesourcery.com ([65.74.133.4]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MWTtX-0005ok-8o for qemu-devel@nongnu.org; Thu, 30 Jul 2009 07:33:59 -0400 From: Paul Brook Subject: Re: [Qemu-devel] Various VGA / VNC fixes and cleanups to prep for multiheaded graphics Date: Thu, 30 Jul 2009 12:33:34 +0100 References: <1248948912-7877-1-git-send-email-zamsden@redhat.com> <20090730103406.GG21611@redhat.com> <4A71776C.4030400@redhat.com> In-Reply-To: <4A71776C.4030400@redhat.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200907301233.56681.paul@codesourcery.com> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Zachary Amsden On Thursday 30 July 2009, Zachary Amsden wrote: > Daniel P. Berrange wrote: > > For VNC, there is an documented extension which allows for intelligent > > client side handling of multiple displays. Essentially the server VNC > > framebuffer represents the combined real estate of all displays (this > > lets dumb VNC clients work), and the "ExtendedDesktopSize" extension > > allows intelligent clients to query what regions within the framebuffer > > correspond to each display. So it would be useful to implement this in > > QEMU if we're to allow multiple VGA adapters. > > This is true, but in this context, is it useful? If one wants multiple > displays, one can easily double the height or width of the virtual > display and run nested servers inside of them. If you just want twice as screen real estate on a desktop system then yes, you can increase the resolution. However in many cases we actually want multiple independent displays. Paul