Based on kernel version 4.10.8. Page generated on 2017-04-01 14:43 EST.
1 Apple Touchpad Driver (appletouch) 2 ---------------------------------- 3 Copyright (C) 2005 Stelian Pop <stelian@popies.net> 4 5 appletouch is a Linux kernel driver for the USB touchpad found on post 6 February 2005 and October 2005 Apple Aluminium Powerbooks. 7 8 This driver is derived from Johannes Berg's appletrackpad driver[1], but it has 9 been improved in some areas: 10 * appletouch is a full kernel driver, no userspace program is necessary 11 * appletouch can be interfaced with the synaptics X11 driver, in order 12 to have touchpad acceleration, scrolling, etc. 13 14 Credits go to Johannes Berg for reverse-engineering the touchpad protocol, 15 Frank Arnold for further improvements, and Alex Harper for some additional 16 information about the inner workings of the touchpad sensors. Michael 17 Hanselmann added support for the October 2005 models. 18 19 Usage: 20 ------ 21 22 In order to use the touchpad in the basic mode, compile the driver and load 23 the module. A new input device will be detected and you will be able to read 24 the mouse data from /dev/input/mice (using gpm, or X11). 25 26 In X11, you can configure the touchpad to use the synaptics X11 driver, which 27 will give additional functionalities, like acceleration, scrolling, 2 finger 28 tap for middle button mouse emulation, 3 finger tap for right button mouse 29 emulation, etc. In order to do this, make sure you're using a recent version of 30 the synaptics driver (tested with 0.14.2, available from [2]), and configure a 31 new input device in your X11 configuration file (take a look below for an 32 example). For additional configuration, see the synaptics driver documentation. 33 34 Section "InputDevice" 35 Identifier "Synaptics Touchpad" 36 Driver "synaptics" 37 Option "SendCoreEvents" "true" 38 Option "Device" "/dev/input/mice" 39 Option "Protocol" "auto-dev" 40 Option "LeftEdge" "0" 41 Option "RightEdge" "850" 42 Option "TopEdge" "0" 43 Option "BottomEdge" "645" 44 Option "MinSpeed" "0.4" 45 Option "MaxSpeed" "1" 46 Option "AccelFactor" "0.02" 47 Option "FingerLow" "0" 48 Option "FingerHigh" "30" 49 Option "MaxTapMove" "20" 50 Option "MaxTapTime" "100" 51 Option "HorizScrollDelta" "0" 52 Option "VertScrollDelta" "30" 53 Option "SHMConfig" "on" 54 EndSection 55 56 Section "ServerLayout" 57 ... 58 InputDevice "Mouse" 59 InputDevice "Synaptics Touchpad" 60 ... 61 EndSection 62 63 Fuzz problems: 64 -------------- 65 66 The touchpad sensors are very sensitive to heat, and will generate a lot of 67 noise when the temperature changes. This is especially true when you power-on 68 the laptop for the first time. 69 70 The appletouch driver tries to handle this noise and auto adapt itself, but it 71 is not perfect. If finger movements are not recognized anymore, try reloading 72 the driver. 73 74 You can activate debugging using the 'debug' module parameter. A value of 0 75 deactivates any debugging, 1 activates tracing of invalid samples, 2 activates 76 full tracing (each sample is being traced): 77 modprobe appletouch debug=1 78 or 79 echo "1" > /sys/module/appletouch/parameters/debug 80 81 Links: 82 ------ 83 84 [1]: http://johannes.sipsolutions.net/PowerBook/touchpad/ 85 [2]: http://web.archive.org/web/*/http://web.telia.com/~u89404340/touchpad/index.html