My raspiNAS is based on a raspberry pi 2, with 1GB of ram and a 4core ARM processor, a more powerful board able to run a NAS and also a full HD media center. So in order to simplify my home setup and remove a raspberry I’ve decided to merge the KODI mediacenter (based on OSMC) into the raspiNAS board.

We have to create the group “input” if it doesn’t exist.

sudo addgroup --system input

Edit the file

sudo nano /etc/udev/rules.d/99-input.rules

enter the following text and save it:

SUBSYSTEM==input, GROUP=input, MODE=0660
KERNEL==tty[0-9]*, GROUP=tty, MODE=0660

Create & edit the following file:

sudo nano /etc/udev/rules.d/10-permissions.rules

enter this text and save it:

# input
KERNEL=="mouse*|mice|event*",   MODE="0660", GROUP="input"
KERNEL=="ts[0-9]*|uinput",     MODE="0660", GROUP="input"
KERNEL==js[0-9]*,             MODE=0660, GROUP=input
# tty
KERNEL==tty[0-9]*,            MODE=0666
# vchiq
SUBSYSTEM==vchiq,  GROUP=video, MODE=0660

Run the following commands for user pi (if you haven’t changed your user name):

sudo usermod -a -G audio pi
sudo usermod -a -G video pi
sudo usermod -a -G input pi
sudo usermod -a -G dialout pi
sudo usermod -a -G plugdev pi
sudo usermod -a -G tty pi

To play full HD video in Kodi, you have to set

gpu_mem=160

in /boot/config.txt (or higher) and reboot the board.

Now install kodi with:

sudo apt-get install kodi

Edit /etc/default/kodi in order to start kodi at boot:

# Set this to 1 to enable startup
ENABLED=1

# The user to run Kodi as
USER=pi

# Adjust niceness of Kodi (decrease for higher priority)
NICE=-5

Source: https://www.raspberrypi.org/forums/viewtopic.php?t=99866