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Re: [Qemu-devel] [PATCH] [RFC] usb-wacom

From: Jamie Lokier
Subject: Re: [Qemu-devel] [PATCH] [RFC] usb-wacom
Date: Thu, 14 Aug 2008 13:26:28 +0100
User-agent: Mutt/1.5.13 (2006-08-11)

François Revol wrote:
> > > First, mouse stayed in the top-left corner... Seems coords were set
> > > to
> > > 0,0 when no button is pressed, which is wrong, most tablets
> > > actually
> > > sense the stylus even when it's not yet touching the surface.
> >
> > I see similar problems with Windows Server 2003 guest and the USB
> > tablet emulation.  The pointer jumps about randomly, so it's not
> > usable.  It works fine with Windows XP guest.
> XP likely disregards mouse up packets and caches the last position.

Would caching the last position cause the mouse to jump all over the
screen from frame to frame (no intermediate motion) as if it's reading
random absolute coordinates?

-- Jamie

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