命令行键入xinput，查看touchpad设备ID，比如我的：
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜↳ Cypress APA Trackpad (cyapa) 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)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ Sleep Button id=10 [slave keyboard (3)] ↳ Integrated_Webcam_HD id=13 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=15 [slave keyboard (3)]可以看到触摸板的ID是14，那么接下来执行命令
xinput disable 14即可禁用触摸板。如需恢复触摸板，执行命令
xinput enable 14