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

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Jun 19, 2010 at 04:48:46PM +0100, Jeremy Fitzhardinge wrote:
> On 06/19/2010 04:41 PM, Pasi Kärkkäinen wrote:
> > 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..
> >   
> 
> Yes, that should be fixed in current xen-unstable - it was a xenbus
> race-condition.  What guest are you seeing it in?  I've found that I
> still don't get absolute pointers in Centos guests.
> 

Yeah, it's a CentOS 5.5 guest that gets relative pointer on my Fedora 13 dom0.
On a CentOS5 dom0 it gets absolute though..

Fedora 13 guest gets absolute pointer on my Fedora 13 dom0..

-- Pasi


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