> Why are pointer cursors misplaced on paravirtualized drivers?
>
> It is because the paravirtualized drivers or VM viewers do *not* place
> the cursor plane at the CRTC_X, CRTC_Y position in the guest CRTC area.
> This is obvious: if CRTC_X, CRTC_Y were honoured, there would be no
> misplacement.
Hi,
> I don’t think I see how that fixes anything. In particular I don’t see
> a way of fixing the old user space at all. We require hotspot info,
> old user space doesn’t set it because there’s no way of setting it on
> atomic kms. Whether we expose cursor plane or not doesn’t change the
> fact
Hi,
> > Typically there is a communication path from guest to host for pointer
> > movements (i.e. crtc_x + crtc_y updates), so the host knows where the
> > guest wants the cursor plane being placed. So in case the pointer is
> > moved by other means (different input device, some application wa
Hi,
> > 4. make sure the hotspot property is only set on VIRTUAL_CURSOR planes
> > and nothing else in the rebased patch series
>
> Simon also mentioned on irc that these special planes must not expose the
> CRTC_X/Y property, since that doesn't really do much at all. Or is our
> understand
Hi,
> > As Pekka mentionned, I'd also like to have a conversation of how far we
> > want to
> > push virtualized driver features. I think KMS support is a good feature to
> > have
> > to spin up a VM and have all of the basics working. However I don't think
> > it's
> > a good idea to try to
