Hi xor
Plug in the tablet and run:
lsusb | grep -i Wacom
You should see something similar to:
Bus 001 Device 004: ID 056a:0303 Wacom Co., Ltd
Now take the the last 4 digits of the ID number, 0303 in this example
and see if your device is supported:
tc@E310:~$ modinfo wacom | grep 0303
alias: hid:b0003g0101v0000056Ap00000303
In this example the device is supported because the alias ends in 0303.
Make sure the kernel loaded the wacom driver:
lsmod | grep -i Wacom
If that command did not print a result, try loading the driver:
sudo modprobe wacom
You might also need some of the following:
input-tablet-touchscreen-KERNEL.tcz
libwacom.tcz
libinput.tcz
xf86-input-wacom.tcz