Thanks for the explanations :)
If your kernel is 4.5 or newer you could check out the branch for-4.11[1]
> and build input-wacom [2] from that branch instead of master. Support for
> earlier kernels is currently in development and will be in the next release
> of input-wacom.
OK, I'm on ubuntu
The wcmIsSiblingDevice function uses several tricks to try and determine
if two devices should be considered siblings. If its 'logical_only'
parameter is false, this includes comparing device names. Device name
comparison is complicated by the fact that suffixes are added on by
the X and kernel
