XF86Config Settings for a Logitech Marble FX

After using trackballs for years, I finally set up my /etc/X11/XF86Config to enable the fourth button. And I thought I'd post the relevant section to help anyone else who wants to do the same thing.

Well, actually, I just wanted to put it on my server so that I could carry my trackball to a job site and be able to download the section that makes it work. But everyone else gets to benefit.


# Logitech Marble FX Trackball
Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Device" "/dev/psaux"
        Option      "Emulate3Buttons" "no"      # which is the default

        # Protocol
        # PS/2 is the basic vanilla protocol, but lacks the extras.
        # Some people report that they use IMPS/2, but it doesn't work for me.
        Option      "Protocol" "MouseManPlusPS/2"

        # Tells X about the 4th button (the red one).
        Option      "Buttons"         "4"

        # Sets the 4th button as a lock for button #1.
        # To do a drag, you click and release the red button,
        # move the ball, and then click the red button again to release.
        Option      "DragLockButtons" "4 1"

        # Or you can set it up to emulate a wheel mouse like this.
        # (Moving the ball while the red button is pressed scrolls.)
        #Option     "EmulateWheel"  "1"
        #Option     "EmulateWheelButton"  "4"  # (the default)
EndSection

Disclaimer: This is for XFree86 version 4, specifically 4.3.0.

NOTE: For xorg (at least for 6.7), I had to use "Auto" for the protocol.

And for 7.0, my mouse section turned into this:

Section "InputDevice"
Identifier  "Mouse0"
Driver      "mouse"
        Option      "Device" "/dev/input/mice"
	Option      "Name"   "Logitech Marble Mouse (trackball)"
	Option      "Protocol" "Auto"

	# Big left + big right = middle
#	Option      "Emulate3Buttons" "True"
#	Option      "Emulate3Timeout" "50"
#	Option      "ChordMiddle"

	# Small left button is a lock for button #1.
	Option      "DragLockButtons" "8 1"

#       Option      "EmulateWheel" "True"
#       Option      "EmulateWheelButton" "9" 
        Option      "ZAxisMapping" "6 7"
EndSection