Op 19-08-11 14:13, Seth Forshee schreef:

On Fri, Aug 19, 2011 at 04:29:57PM +0800, JJ Ding wrote:

quoted

quoted

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.

Yes, in other words, in the case of v1 or v2, the switch(fingers) does 
nothing if fingers == 0.

Maybe you could do put these 3 lines inside a "if (fingers != 0)":
+	input_report_abs(dev, ABS_X, x1);
+	input_report_abs(dev, ABS_Y, y1);
+	elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);

Éric
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