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-Apple Touchpad Driver (appletouch)
-----------------------------------
- Copyright (C) 2005 Stelian Pop <stelian@popies.net>
-
-appletouch is a Linux kernel driver for the USB touchpad found on post
-February 2005 and October 2005 Apple Aluminium Powerbooks.
-
-This driver is derived from Johannes Berg's appletrackpad driver[1], but it has
-been improved in some areas:
- * appletouch is a full kernel driver, no userspace program is necessary
- * appletouch can be interfaced with the synaptics X11 driver, in order
- to have touchpad acceleration, scrolling, etc.
-
-Credits go to Johannes Berg for reverse-engineering the touchpad protocol,
-Frank Arnold for further improvements, and Alex Harper for some additional
-information about the inner workings of the touchpad sensors. Michael
-Hanselmann added support for the October 2005 models.
-
-Usage:
-------
-
-In order to use the touchpad in the basic mode, compile the driver and load
-the module. A new input device will be detected and you will be able to read
-the mouse data from /dev/input/mice (using gpm, or X11).
-
-In X11, you can configure the touchpad to use the synaptics X11 driver, which
-will give additional functionalities, like acceleration, scrolling, 2 finger
-tap for middle button mouse emulation, 3 finger tap for right button mouse
-emulation, etc. In order to do this, make sure you're using a recent version of
-the synaptics driver (tested with 0.14.2, available from [2]), and configure a
-new input device in your X11 configuration file (take a look below for an
-example). For additional configuration, see the synaptics driver documentation.
-
- Section "InputDevice"
- Identifier "Synaptics Touchpad"
- Driver "synaptics"
- Option "SendCoreEvents" "true"
- Option "Device" "/dev/input/mice"
- Option "Protocol" "auto-dev"
- Option "LeftEdge" "0"
- Option "RightEdge" "850"
- Option "TopEdge" "0"
- Option "BottomEdge" "645"
- Option "MinSpeed" "0.4"
- Option "MaxSpeed" "1"
- Option "AccelFactor" "0.02"
- Option "FingerLow" "0"
- Option "FingerHigh" "30"
- Option "MaxTapMove" "20"
- Option "MaxTapTime" "100"
- Option "HorizScrollDelta" "0"
- Option "VertScrollDelta" "30"
- Option "SHMConfig" "on"
- EndSection
-
- Section "ServerLayout"
- ...
- InputDevice "Mouse"
- InputDevice "Synaptics Touchpad"
- ...
- EndSection
-
-Fuzz problems:
---------------
-
-The touchpad sensors are very sensitive to heat, and will generate a lot of
-noise when the temperature changes. This is especially true when you power-on
-the laptop for the first time.
-
-The appletouch driver tries to handle this noise and auto adapt itself, but it
-is not perfect. If finger movements are not recognized anymore, try reloading
-the driver.
-
-You can activate debugging using the 'debug' module parameter. A value of 0
-deactivates any debugging, 1 activates tracing of invalid samples, 2 activates
-full tracing (each sample is being traced):
- modprobe appletouch debug=1
- or
- echo "1" > /sys/module/appletouch/parameters/debug
-
-Links:
-------
-
-[1]: http://johannes.sipsolutions.net/PowerBook/touchpad/
-[2]: http://web.archive.org/web/*/http://web.telia.com/~u89404340/touchpad/index.html