OK, probably last email of the night.  I notice this in xinput output
in patch were its good.

                  Label: Abs X
                  Range: 0.000000 - 15360.000000
                  Resolution: 0 units/m
                  Mode: relative

And it changes to this in the first patch were it goes bad:

                  Label: Abs X
                  Range: -1.000000 - -1.000000
                  Resolution: 0 units/m
                  Mode: relative

So I'm going to take a wild guess it may be related to how we are
calculating delta.  Its not as simple as changing the ranges back to
old values.  I tried that... Next up is looking at what we are
calculating.

Chris

On Mon, Jan 10, 2011 at 7:20 PM, Chris Bagwell <ch...@cnpbagwell.com> wrote:
> Here is what my bisect turns up:
>
> At this commit, the cursor becomes overly accelerated or jumpy:
>
> 1e4d3d7060a1c438ac619cb64febb44bc45b47ed
> Remove wcmInitialCoordiantes, move into wcmInitAxes
>
> At this commit, it always slams into left wall:
>
> 6f5f29b49a6ebda7ae13ca9c32e6e16cf3181fc2
> Purge screen coordinate storage
>
> I may have got jumpy vs. left wall wrong but it should correct that
> patches before "Purge screen.." have reasonable cursor movement on
> touch device (not tested extensively).
>
> No obvious reason why when looking at diff so sending to mailing list for 
> input.
>
> Chris
>
> On Mon, Jan 10, 2011 at 2:22 AM, Favux ... <favux...@gmail.com> wrote:
>> Hi Peter,
>>
>> Bisection shows it is the 12-21-10 "Merge branch 'multimonitor-purge'"
>> commit.  Its snapshot xf86-input-wacom-68351da breaks touch.  Although
>> rather than slamming to the left it jitters horizontally in place over
>> about 1.5 cm.  The prior commit of the same date "Bamboo tablet does
>> not report device_id anymore" snapshot xf86-input-wacom-2b9eb3d still
>> has working touch.
>>
>> Favux
>>
>> On Sun, Jan 9, 2011 at 11:53 PM, Peter Hutterer
>> <peter.hutte...@who-t.net> wrote:
>>>
>>> can you run a bisect over the code to identify which commit broke it?
>>> three different features got merged, multimonitor removal, the scrollring
>>> fixes and chris' bamboo patches. Not sure which one caused the bug.
>>>
>>> Cheers,
>>>  Peter
>>>
>>
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