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X240sのUbuntu 14.04におけるtouchpadの設定

あちこち情報を探して、いまのところ次のような感じに落ち着いている。

/usr/share/X11/xorg.conf.d/52-thinkpad.confというファイルを作って、次の内容を書き込み、ログアウト&ログイン。

Section "InputClass"
  Identifier "touchpad catchall"
  Driver "synaptics"
  MatchIsTouchpad "on"
  MatchDevicePath "/dev/input/event*"
  # Option "JumpyCursorThreshold" "250"
  Option "VertResolution" "100"
  Option "HorizResolution" "65"
  Option "MinSpeed" "1"
  Option "MaxSpeed" "1"
  Option "AccelerationProfile" "2"
  Option "AdaptiveDeceleration" "16"
  Option "ConstantDeceleration" "16"
  Option "VelocityScale" "32"
  Option "HorizHysteresis" "50"
  Option "VertHysteresis" "50"
EndSection

Section "InputClass"
  Identifier "Fixing clickpad buttons"
  MatchDriver "synaptics"

  # Use the top area of the trackpad as mouse buttons.
  # The meaning of these eight values are:
  # Right button: left, right, top, bottom
  # Middle button: left, right, top, bottom
  Option "SoftButtonAreas" "60% 0 0 5% 40% 60% 0 5%"

  # Don't use the top of the trackpad for mouse movement
  Option "AreaTopEdge" "5%"
EndSection

情報源は、http://askubuntu.com/questions/382344/ubuntu-14-04-fine-tuning-touchpad-for-thinkpad-s431など。