Re: [Qemu-devel] [PATCH 3/3 v4] xenfb: Add [feature|request]-raw-pointer

[Anthony PERARD <anthony.perard@citrix.com>]

On Wed, Oct 11, 2017 at 01:19:25PM -0700, Stefano Stabellini wrote:
> On Wed, 11 Oct 2017, Anthony PERARD wrote:
> > The only observation I have is that on a Linux guest, when I have
> > usbdevice=tablet, with this series the pv mouse seems to become the
> > primary way of gueting mouse events (without, the tablet is primary).
> > So, on my VNC client instead of having both mouse in the guest and on my
> > desktop being at the same place, there is like a zoom of the mouse (the
> > zoom centered on the top-left corner). (That's better than relative
> > mouse event that we can get with the emulation.)
> 
> Thanks for testing. I am not completely sure about what should be the
> right behavior when both usbdevice=tablet and pvmouse are present.
> Typically, PV devices take precedence over emulated devices, so maybe
> it is OK that PV mouse is the primary device in this case.
> 
> But we would need to document this behavioral change in the commit
> descriptions.

Maybe something like "WARNING: pvmouse is fixed and now works!" :)

I think the change come from the fact that without the second patch, the
pv mouse doesn't work (or at least, I did not manage to make it work).

> The other question is whether the "zoom of the mouse" you are seeing is
> normal or whether we can "fix" it somehow. I guess it has always been
> the case for PV mouse? It is not something new, is it?

Yes, I think it always as been the case for PV mouse. I pretty sure I've
seen this behavior long time ago.

-- 
Anthony PERARD