1.xinput列出设备列表
2.xinput --list-props "pointer:Logitech Unifying Device. Wireless PID:400a" //可以不看
3.xinput --set-prop "pointer:Logitech Unifying Device. Wireless PID:400a" "Device Accel Constant Deceleration" 1.7 //后面数字大于1就变慢，数字越大速度越慢
详细参考地址：http://www.ydmsh.com/www/Blog/Show/id/162/