Comment 1 for bug 1498658

On Ubuntu, users should already have write access to /dev/uinput:

$ getfacl /dev/uinput
getfacl: Removing leading '/' from absolute path names
# file: dev/uinput
# owner: root
# group: autopilot
user::rw-
user:mdeslaur:rw-
group::rw-
mask::rw-
other::---

Is that not enough?