Comment 2 for bug 737051

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Chris Villa (chrisvxd) wrote : Re: Alps touchpad detected, but scrolling not working

Using the below command, you can tell Ubuntu to treat it as a PS/2 mouse with a scroll wheel:

echo "options psmouse proto=imps"|sudo tee -a /etc/modprobe.d/psmouse.conf; sudo modprobe -r psmouse; sudo modprobe psmouse

(Thank you help.ubuntu.com)