Wacom

Wacom tablets, touchscreens.

System configuration
You probably need this option for tablet to function properly even if you don't have Intuos/Graphire tablet as it says in the description.

Some tablet models may also require these options:

After kernel is configured, update your INPUT_DEVICES Portage variable:

You should also create Xorg config file so that Xorg knows which driver should be used for the tablet. Example:

Xinput2 multitouch
The default setting of the  xinput driver has "gesture emulation".

If we disable it, true multitouch events will be emitted instead and can be used e.g. with Firefox.