https://askubuntu.com/questions/1000869/how-to-run-the-new-huion-tablets-on-linux
as superuser, copy this into a new file /usr/share/X11/xorg.conf.d/90-huion950P.conf
Section "InputClass"
Identifier "Huion tablets with Wacom driver"
MatchUSBID "256c:006d*"
MatchIsTablet "true"
MatchDevicePath "/dev/input/event*"
Driver "wacom"
EndSection
> xsetwacom --list
Wacom HID 488E Pen stylus id: 20 type: STYLUS
Wacom HID 488E Finger touch id: 21 type: TOUCH
Wacom HID 488E Pen eraser id: 30 type: ERASER
HUION Huion Tablet_H950P Pen stylus id: 32 type: STYLUS
HUION Huion Tablet_H950P Pad pad id: 33 type: PAD
Step 4: customize the device names for STYLUS and PAD below, and of course set the commands according to your own preference.
> ./tabInit