В общем, wacom прописан в xorg.conf как-то типа:
Section "InputDevice"
Driver "wacom"
Identifier "cursor"
Option "Device" "/dev/input/wacom"
Option "Type" "cursor"
Option "USB" "on"
Option "Vendor" "WACOM"
Option "Mode" "Relative"
EndSection
А в /dev/input/wacom он уходит благодаря 10-wacom.conf у udev:
SUBSYSTEM=="usb", SYSFS{idVendor}=="056a", SYSFS{idProduct}=="0027", SYMLINK+="input/wacom"
Но валится вот так (отрывок из лога иксов):
[ 7476.667] (II) Using input driver 'wacom' for 'stylus'
[ 7476.667] (II) Loading /usr/lib/xorg/modules/input/wacom_drv.so
[ 7476.667] (**) stylus: always reports core events
[ 7476.667] (**) Option "Device" "/dev/input/wacom"
[ 7476.667] (EE) stylus: usbDetect: can not ioctl version
[ 7476.667] (EE) stylus: cannot identify device class.
[ 7476.667] (EE) PreInit returned 8 for "stylus"