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

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Jun 19, 2010 at 06:40:10PM +0100, Jeremy Fitzhardinge wrote:
> On 06/19/2010 05:22 PM, Pasi Kärkkäinen wrote:
> > 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..
> >   
> 
> Huh, that is interesting.  Maybe there's still a race or something there...
> 

Yeah.. maybe. Note that I'm running Xen 4.0.1-rc3-pre and not xen-unstable..

-- Pasi


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel