Xorg 1.5 XInput Hotplug

之前寫過 Xorg 1.4 XInput Hotplug,提到 xorg, evdev 可以利用 hal 自動偵測硬體載入 driver 與設定參數,而即將 release 的 Xorg 1.5 又新增了一些可以在 hal policy 裡設定的參數:

  • input.x11_driver 可以設定這個 device 要使用的 driver,對應到 xorg.conf 的 Driver 選項
  • input.x11_options.<option name> 則可以設定任意可以用 xorg.conf 裡的 Option 設定的選項 (除了 Option Device,因為 hal 已經知道是甚麼 device)

如今我的 /etc/hal/fdi/policy/10-x11-input.fdi 長這樣:

<?xml version="1.0" encoding="ISO-8859-1"?>
<deviceinfo version="0.2">
  <device>
      <match key="info.capabilities" contains="input.mouse">
          <merge key="input.x11_driver" type="string">mouse</merge>
          <match key="/org/freedesktop/Hal/devices/computer:system.kernel.name"
              string="Linux">
              <merge key="input.x11_driver" type="string">evdev</merge>
          </match>
      </match>
 
    <match key="info.capabilities" contains="input.keys">
        <merge key="input.x11_options.XkbRules" type="string">base</merge>
        <!-- If we're using Linux, we use evdev by default (falling back to
        keyboard otherwise). -->
        <merge key="input.x11_driver" type="string">keyboard</merge>
        <merge key="input.x11_options.XkbModel" type="string">pc105</merge>
        <match key="/org/freedesktop/Hal/devices/computer:system.kernel.name"
            string="Linux">
            <merge key="input.x11_driver" type="string">evdev</merge>
            <merge key="input.x11_options.XkbModel" type="string">evdev</merge>
        </match>
        <merge key="input.x11_options.XkbVariant" type="string" />
        <merge key="input.x11_options.XkbLayout" type="string">dvorak</merge>
        <merge key="input.x11_options.XkbOptions" type="string">ctrl:nocaps</merge>
    </match>
    <match key="info.capabilities" contains="input.touchpad">
        <merge key="input.x11_driver" type="string">synaptics</merge>
        <merge key="input.x11_options.Protocol" type="string">auto-dev</merge>
        <merge key="input.x11_options.SHMConfig" type="string">on</merge>
        <merge key="input.x11_options.LeftEdge" type="string">1100</merge>
        <merge key="input.x11_options.RightEdge" type="string">5800</merge>
        <merge key="input.x11_options.TopEdge" type="string">1600</merge>
        <merge key="input.x11_options.BottomEdge" type="string">4200</merge>
        <merge key="input.x11_options.HorizEdgeScroll" type="string">on</merge>
    </match>
  </device>
</deviceinfo>

我的 /etc/X11/xorg.conf 只剩下必要的:

Section "Device"
    Identifier  "i915gm"
    Driver      "intel"
EndSection
 
Section "Screen"
    Identifier  "Default Screen"
    Device      "i915gm"
    DefaultDepth    24
    SubSection "Display"
        Modes       "1280x768"
        Virtual     1280 1792
    EndSubSection
EndSection

X 啟動的 log 如下:

(II) config/hal: Adding input device SynPS/2 Synaptics TouchPad
(II) LoadModule: "synaptics"
 
(II) Loading /usr/lib/xorg/modules/input//synaptics_drv.so
(II) Module synaptics: vendor="X.Org Foundation"
        compiled for 1.4.99.906, module version = 0.15.0
        Module class: X.Org XInput Driver
        ABI class: X.Org XInput driver, version 2.1
(II) Synaptics touchpad driver version 0.15.0
(**) Option "Device" "/dev/input/event8"
(**) Option "SHMConfig" "on"
(**) Option "LeftEdge" "1100"
(**) Option "RightEdge" "5800"
(**) Option "TopEdge" "1600"
(**) Option "BottomEdge" "4200"
(**) Option "HorizEdgeScroll" "on"
(--) SynPS/2 Synaptics TouchPad touchpad found
(**) SynPS/2 Synaptics TouchPad: always reports core events
(II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: MOUSE)
(--) SynPS/2 Synaptics TouchPad touchpad found

未來各 distro 可以提供預設的 fdi 檔,常見的 input device 都可以隨插即用 :)