On Fri, Aug 19, 2011 at 04:29:57PM +0800, JJ Ding wrote:
> > You should only report the ABS_[XY] coordinates when fingers != 0. The
> > xorg synaptics module sees the values reported in that case as
> > legitimate. This is causing me to see strange behaviors when scrolling
> > with two-finger drags.
> AFAIK, though v2 and v3 differ in packet format, they really report the
> same data to the userspace. In this version of v3 support, I even try to
> make v2 and v3 report all the data in the same sequnce. If you're seeing
> this issue, maybe we should do the same with v2?

Actually neither v1 nor v2 reports ABS_[XY] unless fingers != 0. In v2
the reporting is in a switch statement on the number of fingers, and 0
is unhandled.