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Re: [Xen-devel] pvfb: Absolute vs relative mouse tracking mystery

To: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] pvfb: Absolute vs relative mouse tracking mystery
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Sat, 19 Jun 2010 18:41:45 +0300
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Tue, May 11, 2010 at 11:56:38AM +0100, Stefano Stabellini wrote:
> On Mon, 10 May 2010, Jeremy Fitzhardinge wrote:
> > On 05/10/2010 07:41 AM, Stefano Stabellini wrote:
> > > On Fri, 7 May 2010, Jeremy Fitzhardinge wrote:
> > >   
> > >> On one of my host machines, in PV guests using pvfb I get proper
> > >> absolute mouse tracking.
> > >>
> > >> On another host machine, I get relative tracking in pvfb-using guests.
> > >>
> > >> Both are using identical versions of Fedora 12, identical domain
> > >> configs, and toolstacks and kernels built from the same source.  The log
> > >> files of the X servers are more or less identical.
> > >>
> > >> Help?  Any clues?
> > >>
> > >>     
> > > relative vs absolute depends on a node on xenstore called
> > > "request-abs-pointer" that defaults to 0 and has to be written by the
> > > guest.
> > >   
> > 
> > OK, it looks like it is being set, but the guest is still showing
> > relative behaviour:
> > 
> >     vkbd = ""
> >      0 = ""
> >       backend = "/local/domain/0/backend/vkbd/5/0"
> >       backend-id = "0"
> >       state = "4"
> >       page-ref = "1137660"
> >       event-channel = "11"
> >       request-abs-pointer = "1"
> > 
> > Does this mean qemu-dm's vnc server is not doing the right thing?
>  
> I think is probably xenfb (that is the framebuffer backend in qemu) that
> is not doing the right thing.
> Try adding some debug output in hw/xenfb.c:input_connect.
> 

Jeremy: Did you figure this out? I'm again seeing this problem on my Fedora 13 
+ Xen 4.0.1-rc3-pre box..

-- Pasi


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