Re: [libvirt] [PATCH 1/1] Support for RDP

[Daniel Veillard <veillard redhat com>]

On Thu, Apr 23, 2009 at 02:13:18PM +0100, Daniel P. Berrange wrote:
> On Thu, Apr 23, 2009 at 02:56:46PM +0200, Daniel Veillard wrote:
> > On Thu, Apr 23, 2009 at 01:47:17PM +0100, Daniel P. Berrange wrote:
> > > On Thu, Apr 23, 2009 at 02:41:25PM +0200, Pritesh Kothari wrote:
> > > > > I think we need to add an explicit tag to represent video devices
> > > > > real soon. At very least we need to be able to indicate the type
> > > > > of video card - QEMU supports 4 already vga, cirrus, vmwarevga
> > > > > and xenfb. We probably also need to be able to indicate whether
> > > > > a video card supports multiple monitors / outputs, and the amont
> > > > > of Video RAM, etc.
> > 
> >   agreed
> > 
> > > > in any case how about adding "multihead" and "3Daccel" to it and renaming ram to vram, something like this:
> > > > 
> > > >     <video>
> > > >        <model type='cirrus' vram='500' multihead='2' 3Daccel='yes'/>
> > > >     </video>
> > > 
> > > Sure, vram seems fine. I think i'd call multihead 'monitors' or 'heads'.
> > 
> >   unfortunately the number of heads might not be sufficient, e.g. with 4
> > heads you could have 4 in line or 2x2, the geometry and relative
> > positioning will probably be needed in some way.
> 
> Surely that's something you do inside the guest OS. Inside the guest, 
> if using Xorg, the user interacting will use xrandr to configure them
> in whatever layout they want. Similarly Windows  has tools to decide
> the layout of head..
> 
> The layout will almost certainly change to match that of the desktop
> used by the end-user of the VM.
> 
> eg we expose 2 heads to the guest OS. As user of the guest I connect
> using VNC and discover 2 heads.  My real desktop machine has 2
> monitors 1 above the other, so I run xrandr inside the guest to
> say the 2 heads should be above each other to match my real desktop.
> 
> Even with real hardware, there's no way to inform the OS what the
> physical layout is, its all done by the user with the OS tools. So
> it doesn't seem like topology is necccessary in libvirt config to me

  Right, I got confused, that's not the proper level !

Daniel

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