On my Thinkpad X230 Tablet after the upgrade from 13.10 to 14.04 the finger touch stopped working.
It is listed by xsetwacom:
xsetwacom --list devices
Wacom ISDv4 E6 Pen stylus id: 10 type: STYLUS
Wacom ISDv4 E6 Finger touch id: 11 type: TOUCH
Wacom ISDv4 E6 Pen eraser id: 16 type: ERASER
But touching the screen neither moves the cursor nor triggers a mouse click. And the wacom control panel does not list the finger touch, only stylus and eraser.
Any idea?