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From: Sean Bruno <seanbru@yahoo-inc.com>
To: "Luke S. Crawford" <lsc@prgmr.com>
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Date: Tue, 26 Jul 2011 16:40:25 -0700
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Cc: "freebsd-xen@freebsd.org" <freebsd-xen@freebsd.org>
Subject: Re: FreeBSD 8, PV i386 VNC fails?
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On Tue, 2011-07-26 at 15:18 -0700, Luke S. Crawford wrote:
> On Tue, Jul 26, 2011 at 03:04:48PM -0700, Colin Percival wrote:
> > On 07/26/11 14:48, Sean Bruno wrote:
> > > Probably not doing it right.  When I switched from pure HVM to PV on the
> > > i386 VMs in the cluster, VNC stopped working all together.  Did I do it
> > > wrong?
> > 
> > Is it possible to use PV with VNC?  I thought under PV there wasn't any
> > emulated console, just the Xen paravirtual console which lets you read
> > and write characters as on a serial console.
> 
> It's possible, redhat built a paravirtualized framebuffer to give
> pv guests a framebuffer
> 
> http://www.xen.org/files/xensummit_4/Xenpvfb07_Armbruster.pdf
> 
> I imagine the problem is probably hypervisor dependent;  I mean,
> I don't know anyone who actually used the paravirtualized framebuffer,
> so it's probably not well tested, and may suffer from bit rot as other
> features are added to xen.  I tested it, /I believe/ on rhel/centos 5.3.
> _______________________________________________


I think that sort of makes sense to me.  That is, there would need to be
a PV framebuffer driver for PV mode to use it.  I guess.  

Sean