I've installed Yosemite 10.4.4 on ASUS K450LD (X550A), with SmartTouchPad.kext v4.4 help me can use the TouchPad as nature but it's just working for a short time, the period is random then I lost the touchpad control, the pointer float to the bottom left of screen and always floating there. If I pluged external USB mouse, it's still floatting and can't control it. I can't turn off the touchpad with Fn hotkey after lost control.
Here is my TouchPad
pnp 00:06: Plug and Play ACPI device, IDs FLT0102 SYN0a00 SYN0002 PNP0f03 PNP0f13 PNP0f12
Plz helm me solve it