[Spice-devel] spice & multiple monitors

[Alon Levy]

On Mon, Mar 28, 2011 at 10:11:38AM +0400, Emre Erenoglu wrote:
> On Sun, Mar 27, 2011 at 7:00 PM, Alon Levy <alevy at redhat.com> wrote:
> 
> > On Sun, Mar 27, 2011 at 06:36:17PM +0400, Emre Erenoglu wrote:
> > > Hi,
> > >
> > > I have a linux system with two monitors, one internal screen of my laptop
> > > running at 1280x800 and the other is a 22" monitor with 1920x1080
> > > resolution. I use them in an extended desktop mode.
> > >
> > > I would like to assign both of these screens to the virtual machine
> > running
> > > qxl, but I didn't see anywhere how I can do that. I want that the guest
> > > machine sees two monitors connected to it, so that I can use it just like
> > I
> > > use a real system (ie moving windows from one screen to another, etc.).
> > >
> > > The only option I found relevant is the   -f, --full-screen[=auto-conf]
> >  but
> > > it does not work as I expect. Would this boil down to the guest agent
> > issue
> > > or is there something I need to do?
> > >
> > > spice is 0.8.0, qemu 0.14.
> >
> > To get two monitors you need to run the vm with two qxl devices. The first
> > one gets created by the "-vga qxl", the second (and more - you can have
> > up to four) gets created with "-device qxl". The client should pick them
> > up automatically, the old client knows to close or open a window if the
> > guest
> > disables or reenables the screen, the spice-gtk client doesn't do that yet
> > so you will get a number of windows with it anyway.
> >
> >
> Hi Alon,
> 
> Thanks, I managed to do what you're saying. The only issue I'm facing is
> that mouse is now sometimes loosing coordinate synchronization so it becomes
> impossible to work. Is this a known bug? Shall I report it somewhere?

I am not aware of it, please check if it's already reported in freedesktop or
redhat bugzillas (bugzilla.freedesktop.org and bugzilla.redhat.com respectively).
If it isn't reported please report it in freedesktop, thanks!

> 
> Is there any way that this works in fullscreen mode covering both screens of
> my system?

You mean you want to have a single qxl device (i.e. single monitor since each qxl
device is a single monitor device) and the client should use both client (physical)
screens in fullscreen? we don't support that in spicec afaik, and I don't think
anyone has ever considered that - sounds useful if you have two monitors of the
same resolution and physically adjacent. Actually just setting a resolution in the
guest should work in windowed mode (set a large enough resolution and the window
will use space from both monitors), but fullscreen I think will pick one of the monitors.

> -- 
> Emre

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