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RE: [Xen-devel] [PATCH 1/3] Add Summagraphics Tablet emulation

  • To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
  • From: "Dugger, Donald D" <donald.d.dugger@xxxxxxxxx>
  • Date: Wed, 15 Mar 2006 15:22:19 -0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Wed, 15 Mar 2006 23:23:27 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcZIhWFdotEocuEWQg+SImknK5JOtQAAP6pw
  • Thread-topic: [Xen-devel] [PATCH 1/3] Add Summagraphics Tablet emulation


Yes, the 3 patches are independent so you can apply them as you wish.

I'm not sure what your concern is about the touchpad patch.  There was
code to emulate a touchpad in the code but it was all wrong and didn't
work, I basically had to re-do all of the touchpad code to get this to

I'm talking to Johannes Schindelin about getting touchpad emulation put
into straight `qemu' so, eventually, we won't need any special code in
the Xen version but that won't happen for a while and this patch gets us
working until then.

Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
Ph: (303)440-1368 

>-----Original Message-----
>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx] 
>Sent: Wednesday, March 15, 2006 4:05 PM
>To: Dugger, Donald D
>Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-devel] [PATCH 1/3] Add Summagraphics Tablet emulation
>On 15 Mar 2006, at 21:56, Donald D. Dugger wrote:
>> Add Summagraphics Tablet emulation for VNC users.  The current PS/2 
>> emulation
>> is unusable under VNC since a PS/2 mouse provides deltas 
>while VNC only
>> provides absolute coordinates.  Fortunately, the 
>Summagraphics Tablet 
>> provides
>> absolute coordinates and works perfectly with VNC.
>This patch is very big, especially since the modified qemu 
>files appear 
>to already contain support for touchpads. Why is so much code moved 
>around? Although we do want this support, we really don't want to 
>continue our slide away from qemu mainline at an increasing pace! :-)
>Can I apply patches 2 and 3 independent of this one (sounds like patch 
>2 depends on 3 to avoid causing excessive CPU overhead, but 
>neither has 
>dependence on this patch)?
>  -- Keir

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