disable touchpad

:~$ xinput list
⎡ Virtual core pointer                     id=2 [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer               id=4 [slave  pointer  (2)]
⎜   ↳ Kensington      Kensington Expert Mouse  id=10 [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad               id=13 [slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                    id=14 [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)]
    ↳ Video Bus                                id=8 [slave  keyboard (3)]
    ↳ Power Button                             id=9 [slave  keyboard (3)]
    ↳ Integrated Camera                        id=11 [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard             id=12 [slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                   id=15 [slave  keyboard (3)]
:~$ xinput --disable 13

先用xinput 列出所有 input device，然後用 disable 關掉 touchpad

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在使用wayland 後這個 xinput 方式就失效了，沒有出現我用的 touchpad 名稱。
所以參考這一篇 歷經 11 年後的回答，用gnome setting:

Disable:

gsettings set org.gnome.desktop.peripherals.touchpad send-events disabled

Enable:

gsettings set org.gnome.desktop.peripherals.touchpad send-events enabled