安裝gma 500 driver:
sudo add-apt-repository ppa:gma500/ppa && sudo apt-get update
sudo apt-get install poulsbo-driver-2d poulsbo-driver-3d poulsbo-config
修正 touch screen:
xinput list
找出IDEACOM IDC 6680 的id
sudo gedit /etc/X11/Xsession.d/98x11-common_touchscreen
xinput set-int-prop 8 "Evdev Axis Calibration" 32 300 7900 400 7800
把8改為你找到的id