Synaptics及其他：xorg.conf一些新旧设置
Archlinux的xorg-server升级到1.5.3了，最大的变化是默认启用了hotplugging，简单说就是支持输入设备的热插拔了。各位可以去wiki看看，有很清楚的说明。
反映到xorg.conf就是所有的InputDevice都不需要了，扔这儿吧：
Section "InputDevice"当然，别忘了删除ServerLayout字段中的相关内容。
Identifier "Keyboard0"
Driver "keyboard"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
Option "XkbVariant" ""
EndSection
Section "InputDevice"
Identifier "Serial Mouse"
Driver "mouse"
Option "Protocol" "Microsoft"
Option "Device" "/dev/ttyS0"
Option "Emulate3Buttons" "true"
Option "Emulate3Timeout" "70"
Option "SendCoreEvents" "true"
EndSection
Section "InputDevice"
Identifier "PS/2 Mouse"
Driver "mouse"
Option "Protocol" "auto"
Option "ZAxisMapping" "4 5"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "true"
Option "Emulate3Timeout" "70"
Option "SendCoreEvents" "true"
EndSection
Section "InputDevice"
Identifier "USB Mouse"
Driver "mouse"
Option "Device" "/dev/input/mice"
Option "SendCoreEvents" "true"
Option "Protocol" "IMPS/2"
Option "ZAxisMapping" "4 5"
Option "Buttons" "5"
EndSection
Section "InputDevice"
Driver "synaptics"
Identifier "Touchpad"
Option "Device" "/dev/input/mouse1"
Option "Protocol" "auto-dev"
Option "LeftEdge" "1700"
Option "RightEdge" "5300"
Option "TopEdge" "1700"
Option "BottomEdge" "4200"
Option "FingerLow" "25"
Option "FingerHigh" "30"
Option "MaxTapTime" "180"
Option "MaxTapMove" "220"
Option "VertScrollDelta" "100"
Option "MinSpeed" "0.06"
Option "MaxSpeed" "0.12"
Option "AccelFactor" "0.0010"
Option "SHMConfig" "on"
# Option "Repeater" "/dev/ps2mouse"
Option "CircularScrolling" "on"
Option "CircScrollTrigger" "0"
EndSection
触摸板synaptics驱动需要安装xf86-input-synaptics，老的不知在哪一次升级的时候被卸掉了，害我折腾了一会儿，也怪我没重新看一下wiki。以下是我的新配置文件：
<?xml version="1.0" encoding="ISO-8859-1"?>默认配置是/usr/share/hal/fdi/policy/10osvendor/11-x11-synaptics.fdi，复制到/etc/hal/fdi/policy/，再把老的配置项添加进去。型号（如SynPS/2 Synaptics TouchPad）可以用以下命令查到（参见wiki）：
<deviceinfo version="0.2">
<device>
<match key="info.capabilities" contains="input.touchpad">
<match key="info.product" contains="SynPS/2 Synaptics TouchPad">
<merge key="input.x11_driver" type="string">synaptics</merge>
<!-- Arbitrary options can be passed to the driver using
the input.x11_options property since xorg-server-1.5. -->
<!-- EXAMPLE:
<merge key="input.x11_options.LeftEdge" type="string">120</merge>
-->
<merge key="input.x11_options.Protocol" type="string">auto-dev</merge>
<merge key="input.x11_options.LeftEdge" type="string">1700</merge>
<merge key="input.x11_options.RightEdge" type="string">5300</merge>
<merge key="input.x11_options.TopEdge" type="string">1700</merge>
<merge key="input.x11_options.BottomEdge" type="string">4200</merge>
<merge key="input.x11_options.FingerLow" type="string">25</merge>
<merge key="input.x11_options.FingerHigh" type="string">30</merge>
<merge key="input.x11_options.MaxTapTime" type="string">180</merge>
<merge key="input.x11_options.MaxTapMove" type="string">220</merge>
<merge key="input.x11_options.VertScrollDelta" type="string">100</merge>
<merge key="input.x11_options.MinSpeed" type="string">0.06</merge>
<merge key="input.x11_options.MaxSpeed" type="string">0.12</merge>
<merge key="input.x11_options.AccelFactor" type="string">0.0010</merge>
<merge key="input.x11_options.SHMConfig" type="string">true</merge>
<merge key="input.x11_options.CircularScrolling" type="string">on</merge>
<merge key="input.x11_options.CircScrollTrigger" type="string">0</merge>
<merge key="input.x11_options.TapButton1" type="string">1</merge>
<merge key="input.x11_options.TapButton2" type="string">2</merge>
<merge key="input.x11_options.TapButton3" type="string">3</merge>
</match>
<match key="info.product" contains="AlpsPS/2 ALPS">
<merge key="input.x11_driver" type="string">synaptics</merge>
</match>
<match key="info.product" contains="appletouch">
<merge key="input.x11_driver" type="string">synaptics</merge>
</match>
<match key="info.product" contains="bcm5974">
<merge key="input.x11_driver" type="string">synaptics</merge>
</match>
</match>
</device>
</deviceinfo>
hal-device|grep -B 15 input.x11.driver如我的机器上显示是这样的：
--
input.x11_options.MaxTapMove = '220' (string)
input.x11_options.VertScrollDelta = '100' (string)
input.x11_options.MinSpeed = '0.06' (string)
linux.sysfs_path = '/sys/class/input/input8/event8' (string)
linux.device_file = '/dev/input/event8' (string)
input.x11_options.MaxSpeed = '0.12' (string)
info.parent = '/org/freedesktop/Hal/devices/platform_i8042_i8042_AUX2_port' (
string)
input.x11_options.AccelFactor = '0.0010' (string)
input.x11_options.SHMConfig = 'true' (string)
input.x11_options.CircularScrolling = 'on' (string)
input.x11_options.CircScrollTrigger = '0' (string)
input.device = '/dev/input/event8' (string)
input.x11_options.TapButton1 = '1' (string)
input.product = 'SynPS/2 Synaptics TouchPad' (string)
input.x11_options.TapButton2 = '2' (string)
input.x11_driver = 'synaptics' (string)
论坛上也有一些配置（15楼）可以参考。
另外，再附送一个小脚本，可以快速开关Synaptics，我把它绑定到了Fn+1：
#!/bin/bash另外，好象已经可以不用xorg.conf了，但我的还不行，不知是否没装开源ati驱动的缘故（只有fglrx）。
Status=$(synclient -l | grep TouchpadOff | tr -d [:blank:])
eval $Status
if [ "$TouchpadOff" = "0" ]
then
synclient TouchpadOff=1
elif [ "$TouchpadOff" = "1" ]
then
synclient TouchpadOff=0
fi
