Configure Touchpad on Aspire 7738G ubuntu 12.04

edit /etc/default/grub.conf and change line:


GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.nomux"

run update-grub and restart

install the alps driver for ubuntu 

http://people.canonical.com/~sforshee/alps-touchpad/psmouse-alps-0.10/psmouse-alps-dkms_0.10_all.deb


configure /etc/X11/xorg.conf (if nonexistant Create it)



Section "InputClass"
   Identifier "enable synaptics SHMConfig"
   MatchIsTouchpad "on"
   MatchDevicePath "/dev/input/event*"
   Option "SHMConfig" "on"
EndSection

configure the psmouse module to treat the touchpad as a mouse with scrool

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

sudo modprobe -r psmouse

sudo modprobe psmouse