Enable Alt+middle button window resize in Ubuntu 12.04

I have a Dell 6320, with both a touchpad and dual stick (you know, the little nipple in midst of the keyboard).

For some strange reason the Alt+middle button resizing of a window stopped working on my Ubuntu installation in the latest Ubuntu version (LTS 12.04). This is a great disadvantage for me, so I did some research.

Re-enable the HW middle button with a terminal

Open up a terminal, and type this:

xinput set-int-prop "DualPoint Stick" "Evdev Middle Button Emulation" 8 0
xinput set-int-prop "DualPoint Stick" "Evdev Wheel Emulation" 0

These settings will reset when you boot, so to make this permanent for the entire system, make your /usr/share/X11/xorg.conf.d/11-evdev-trackpoint.conf file to look like this :

# file: /usr/share/X11/xorg.conf.d/11-evdev-trackpoint.conf
# Trackpoint users want wheel emulation. 
# Yes, but not DualPoint Stick users! ;) /guzaho

Section "InputClass"
    Identifier    "trackpoint catchall"
    MatchIsPointer    "true"
    MatchProduct    "TrackPoint|DualPoint Stick"
    MatchDevicePath    "/dev/input/event*"
    Option    "Emulate3Buttons"    "false"
    Option    "EmulateWheel"    "false"
    Option    "EmulateWheelButton"    "2"
    Option    "XAxisMapping"    "6 7"
    Option    "YAxisMapping"    "4 5"

Re-enable the HW middle button with GUI

If you prefer, you can install and run the gpointing-device-settings app. In a terminal, type this:

sudo apt-get install gpointing-device-settings

Now uncheck the «Use middle button emulation» and «Use wheel emulation» checkboxes under DualPoint Stick.


The DualStick comes with 3 hardware buttons, but the DualStick config has the Three button Emulation turned to «true». This means that you’re telling your Xserver that your DualStick does NOT have a third button, and that it should enable faking the third button behaviour when you press both of the left and right buttons simultaneously.


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