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

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

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.


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