X41任务1——Track Point（HAL与sysfs）

一、滚动

新的发行版，比如说Ubuntu 8.10和Fedora 10已经开始使用udev和HAL来配置输入设备了，不再需要修改xorg.conf了。以root身份创建“/etc/hal/fdi/policy/mouse-wheel.fdi”：

 <match key="info.product" string="TPPS/2 IBM TrackPoint">
	<merge key="input.x11_options.EmulateWheel" type="string">true</merge>
	<merge key="input.x11_options.EmulateWheelButton" type="string">2</merge>
	<merge key="input.x11_options.XAxisMapping" type="string">6 7</merge>
	<merge key="input.x11_options.YAxisMapping" type="string">4 5</merge>
	<merge key="input.x11_options.Emulate3Buttons" type="string">true</merge>
	<merge key="input.x11_options.EmulateWheelTimeout" type="string">200</merge>
</match>

立即生效，重启就没了。装了sysfsutils的话就可以每次重启都配置一次。其他的设定：

Name	Type	Default	Notes
sensitivity	Integer	128	Sensitivity
speed	Integer	97	Cursor speed
inertia	Integer	6	Described as "negative inertia." It acts more like friction. High values cause the cursor to snap backward when the Trackpoint is released
reach	Integer	10	Backup for Z-axis press
draghys	Integer	255	Drag hysteresis (how hard it is to drag with Z-axis pressed)
mindrag	Integer	20	Minimum amount of force needed to trigger dragging
thresh	Integer	8	Minimum value for a Z-axis press
upthresh	Integer	255	Used to generate a 'click' on Z-axis
ztime	Integer	38	How sharp of a press
jenks	Integer	135	Minimum curvature for double click
press_to_select	Boolean	0	Press to select
skipback	Boolean	0	Supress movement after drag release
ext_dev	Boolean	0	Disable external device