Simon Thum cc26edfba1 Add hysteresis-based noise reduction ...

This introduces hysteresis into the driver's processing. It significantly
reduces noise motion, i.e. now the pad does no longer generate a stream of
sub-pixel events when just holding the position with the finger down.
Also, taking off the finger no longer generates additional motion,
scrolling becomes flicker-free etc.

The code makes use of "fuzz" from the kernel, if available. This has not
been tested extensively, as an overwhelming majority of evdev touchpad
drivers view 0 (zero) as a good value for fuzz, forcing userland into
assuming "zero fuzz" means "make zero assumptions about fuzz", not
"there is no fuzz". Until things improve, this is what we do.

Anyway, the fuzz a.k.a. hysteresis can be set/overridden with options
and properties, as documented.

Signed-off-by: Simon Thum <simon.thum@gmx.de>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

2011-02-21 11:46:37 +10:00

..

Makefile.am

config: include files redundant in EXTRA_DIST

2010-04-05 20:57:06 -04:00

synaptics-properties.h

Add hysteresis-based noise reduction

2011-02-21 11:46:37 +10:00

synaptics.h

Purge GuestMouse support.

2010-06-17 11:23:30 +10:00