Disable button on mouse (Logitech M720 Triathlon)

Question

There's a button on my mouse that I'm unable to disable. It's right next to my thumb and I keep clicking it by accident. It triggers some kind of alt+tab function and it's very annoying!

Here is my xinput output:

⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Logitech M720 Triathlon                   id=11   [slave  pointer  (2)]
⎜   ↳ Wacom Pen and multitouch sensor Finger touch  id=13   [slave  pointer  (2)]
⎜   ↳ Wacom Pen and multitouch sensor Pen stylus    id=14   [slave  pointer  (2)]
⎜   ↳ Elan Touchpad                             id=15   [slave  pointer  (2)]
⎜   ↳ Elan TrackPoint                           id=16   [slave  pointer  (2)]
⎜   ↳ Wacom Pen and multitouch sensor Pen eraser    id=20   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Sleep Button                              id=8    [slave  keyboard (3)]
    ↳ Apple, Inc Apple Keyboard                 id=9    [slave  keyboard (3)]
    ↳ Apple, Inc Apple Keyboard                 id=10   [slave  keyboard (3)]
    ↳ Integrated Camera: Integrated C           id=12   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=17   [slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                    id=18   [slave  keyboard (3)]
    ↳ Logitech M720 Triathlon                   id=19   [slave  keyboard (3)]

Here is the xinput test 11 output, when I click the button:

key press   37 
key press   64 
key press   23 
key release 23 
key release 64 
key release 37

edit: xev output

KeyPress event, serial 40, synthetic NO, window 0x4e00001,
    root 0x16b, subw 0x0, time 3927972, (-192,136), root:(679,596),
    state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 40, synthetic NO, window 0x4e00001,
    root 0x16b, subw 0x0, time 3927980, (-192,136), root:(679,596),
    state 0x14, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 40, synthetic NO, window 0x4e00001,
    root 0x16b, subw 0x0, time 3927988, (-192,136), root:(679,596),
    state 0x1c, keycode 23 (keysym 0xff09, Tab), same_screen YES,
    XLookupString gives 1 bytes: (09) " "
    XmbLookupString gives 1 bytes: (09) "   "
    XFilterEvent returns: False

Is there a way to ignore device ID 11 on startup? If so, how, and how do I make sure it doesn't ignore something else on boot up? I could just ignore these keypresses in xinput but then my keyboard won't be able to press these anymore.

Answer 1

The mouse presents itself both as a mouse and a keyboard. You can disable the keyboard part with:

$ xinput disable 19

Usually you would use the name of the device "Logitech M720 Triathlon" as the last parameter, but the mouse gets the same name, so you'll have to get the number from processing the list. Something like:

$ xinput disable $(xinput --list | grep M720.*keyboard | sed -E 's/.*id=([0-9]+).*/\1/g')

To set it up at the beginning of the Xfce session you can check this.

Answer 2

To map the thumb button on the Logitech M720 Triathlon Multi-Device Mouse open dconf editor and navigate to org/cinnamon/desktop/keybindings/wm/(switch-panels), turn off Use Default Value. Enter into Custom value what you will. Since I wanted to disable the thumb button I entered [''], essentially a null value. I am using Ubuntu 22.04.2 LTS if that adds anything to my answer.

Answer 3

Searching some more I did find an answer, sort of. There is a linux software called Piper (https://www.linuxuprising.com/2020/11/configure-logitech-steelseries-and.html) and I was able to map the 'Unknown' key to going Forward in Firefox, and since I rarely have the opportunity to move a page forward the button effectively does nothing. In Piper there are many functions to which the buttons can be mapped.