I installed 12.04 on an Asus ep121 slate. Touch acts like a left mouse click. Multi-touch doesn't work. I calibrated the screen and installed the latest eGalax etouch driver-no joy. It booted to blank screen.
I reinstalled 12.104, then compiled and installed the latest stable kernel (3.5), in hopes that is better supports multi-touch or at least worked better with the eTouch driver. Rebooted. At log on screen, usb keyboard/mouse do not function.