[Xen-devel] Re: Fwd: Display/Console for HVM domUs

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Andrew D. Ball wrote:
> Is anyone considering FreeNX in addition to VNC?
FreeNX isn't a framebuffer based protocol.  It is a window based 
protocol.  There's not enough information at the QEMU level to do a 
window based protocol.  Perhaps if we had a paravirtual display driver...
Regards,

Anthony Liguori

> Peace.
> Andrew
>
> On Wed, 2006-11-15 at 01:05 +0000, Daniel P. Berrange wrote:
> > On Tue, Nov 14, 2006 at 04:52:41PM -0800, jdsw wrote:
> > > Forwarding to dev list.
> > > /Jd
> > >
> > > jdsw <jdsw2002@xxxxxxxxx> wrote: Date: Thu, 9 Nov 2006 18:37:07 -0800 (PST)
> > > From: jdsw <jdsw2002@xxxxxxxxx>
> > > Subject: Display/Console for  HVM domUs
> > > To: XenUsers <xen-users@xxxxxxxxxxxxxxxxxxx>
> > >
> > >  Hi 
> > >   I have couple of questions on displays under HVM
> > >   1.  When I kill window of DomU with sdl=1, the dom also dies... Is this a bug ? 
> > >       or  expected behaviour. (quite annoying)
> > Its expected - whether its desirable is a completely different matter. I 
> > question
> > the usefullness of SDL at all because of its dependance on having a connection 
> > to
> > the X server available form the shell in which you launch the guest. I can't
> > imagine how this will ever work once XenD has support for managing inactive 
> > domains
> > and stopping/starting them via the XML-RPC interface - since you'll not even 
> > have
> > the SSH forwarded display anymore.
> >
> > >   2. How do I determine the display number for DomUs running with vnc ? For me, 
> > > the vnc display numbers are determined by the order in which the domUs were 
> > > started. This is highly inconveniernt. I tried the vncdisplay=5 in the domu 
> > > config file but it does not help. 
> > If you specify 'vncunused=1' in the config file it will allocate the first 
> > unused
> > port number counting from 5900. If you want to specify an explicit display then
> > set 'vncdisplay=5' and 'vncunused=0'.
> >
> > >    Also, xm list -l domname also does not contain any indication of what display
> > >  is being used ? I want to programatically determined the display number.
> > The info on what port is being listened on is not exposed by either xm or XenD.
> > Instead it is hidden away in xenstore.
> >
> >   # xenstore-ls /local/domain/1 | grep vnc
> >      vnc-port = "5902"
> >
> > If you have libvirt installed, then it is also available when using virsh
> > command to view an XML dump of a domain, eg
> >
> >  # virsh dumpxml demovm | grep graphics
> >     <graphics type='vnc' port='5902'/>
> >
> >
> > Regards,
> > Dan.
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