I own a Hanvon ArtMaster. Sadly the Linux Kernel has no native support for that device. I worked with Havel on an driver for these kind of tablets.

Download the module

Get it from here

Build and load it

tar xavf hanvon-*
cd hanvon-*
insmod hanvon.ko

Now the tablet should work

Load it every boot

cp hanvon.ko /lib/modules/$(uname -r)/kernel/drivers/input/tablet/
echo "hanvon" >> /etc/modules

This will load the module every time you boot