10-thinkpad.conf

Section "InputClass"
	Identifier	"Keyboard-ThinkPad"
	Driver		"libinput"
	#MatchProduct    "ThinkPad Compact Bluetooth Keyboard with TrackPoint"
	#MatchIsKeyboard "on"
	#Option          "SendCoreEvents" "true"
	Option		"XkbLayout" "dvorak,us"
	Option		"XkbVariant" "dvorak"
	Option		"XkbOptions" "ctrl:swapcaps,grp:alt_shift_toggle,grp_led:scroll"
EndSection
Section "InputClass"
	Identifier	"mouse-ThinkPad"
	Driver		"libinput"
        Option          "EmulateWheel" "true"
        Option          "Emulate3Buttons" "true"
        Option          "EmulateWheelButton" "2"
        Option          "XAxisMapping" "6 7"
        Option          "YAxisMapping" "4 5"
	#MatchIsPointer	"yes"
EndSection

11-kensington.conf

Section "InputClass"
  Identifier      "Kensington Trackball"
  Driver          "evdev"
  MatchProduct    "Kensington Expert Mouse"
  MatchIsPointer  "on"
  Option          "Device" "/dev/input/by-id/usb-Kensington_Kensington_Expert_Mouse-event-mouse"
  Option          "SendCoreEvents" "true"

  # Default:
  # .--------. .-----------.
  # | 2:Mid  | | 8:Back    |
  # `--------' `-----------'
  # .--------. .-----------.
  # | 1:Left | | 3:Right   |
  # `--------' `-----------'
  # 4:ScrollUp
  # 5:ScrollDown
  #
  # .--------. .-----------.
  # | 2:Mid  | | 8:Back    |
  # `--------' `-----------'
  # .--------. .-----------.
  # | 1:Left | | 3:Right   |
  # `--------' `-----------'
  # 4:ScrollUp
  # 5:ScrollDown
  #Option          "ButtonMapping" "1 2 8 4 5 6 7 3"

  Option          "EmulateWheel" "true"
  Option          "EmulateWheelButton" "2"
  Option          "EmulateWheelInertia" "20"
  Option          "XAxisMapping" "6 7"
  Option          "YAxisMapping" "4 5"
EndSection

11-marblemouse.conf

Section "InputClass"
  Identifier      "Logitech USB Trackball"
  MatchProduct    "Logitech USB Trackball"
  MatchIsPointer  "on"
  Option          "Device" "/dev/input/by-id/usb-Logitech_USB_Trackball-event-mouse"
  Driver          "evdev"
  Option          "SendCoreEvents" "true"

  Option          "EmulateWheel" "true"
  Option          "EmulateWheelButton" "8"
  Option          "EmulateWheelInertia" "20"
  Option          "XAxisMapping" "6 7"
  Option          "YAxisMapping" "4 5"
EndSection

20-intel.conf

Section "Device"
  Identifier  "Intel Graphics"
  Driver      "intel"
  Option      "DRI" "false"
  Option      "NoAccel" "True"
  Option      "XvMC" "True"
EndSection