I have just bought a Wacom Intuos Pro tablet, and wanted to try it out under Linux. It does work, I was able to configure gimp with pressure sensitivity and also the eraser works out of the box (which does not under Windows ).
It is also working in the desktop environment: as a pen it controls the mouse absolute, and as a touch input, it controls it relative.
What does not work is the buttons on the side of the tablet; what I wanted to configure.

I had to install the kcm-tablet my own, and after installation, the configuration panel still did not appeared in the KDE system configurations.
openSUSE installed a tool called Wacom Tablet finder, which successfully finds my tablet, and recognize it.
Searching for this on the internet, I've found someone having a similar issue with KDE 5, with the addition that it is being recognized as a joystick. I checked the joystick configuration, and indeed, my tablet is listed as a joystick there. I do not know if it was working for him otherwise, like for me.

I also find this rule file (https://gist.github.com/denilsonsa/978f1d842cf5430f57f6) that will disable my tablet, but I do not know if it would completely disables it or just disables it as a joystick.

While it is not a burning matter for me, as the tablet is still working, but since I've saw images on the internet of it fully working, I would like to achieve hat. (Success story: http://www.nass3r.com/wacom-intuos.html )
Can anyone assist me fixing this issue?

Yast hardware information recognizes it as an Generic USB Mouse, and as Intuos5 Touch L. I do not know if that is correct. Like the model name is being queried from the driver instead of the device, but the driver is still correct... or not?

I am using:
openSUSE Leap 42.1
Wacom Intuos Pro L