hardware acceleration on gt218 ion

Hi,

Have installed ubuntu 16.04.1 and kodi 17 (nightly build) on an extremer ultra

kodi : system information / video shows it as gallium 0.4 nva8
ubuntu: system settings/software and updates/ additional drivers shows it as gt218 ion
– using x.org x server nouveau display driver from xserver-xorg-video-nouveau (open source)

When running vdpauinfo I get:

display: localhost:10.0 screen: 0
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
Error creating VDPAU device: 1

Tried vainfo (just in case) and got:

libva info: VA-API version 0.39.0
libva info: va_getDriverName() returns -1
libva error: va_getDriverName() failed with unknown libva error,driver_name=(null)
vaInitialize failed with error code -1 (unknown libva error),exit

When playing a video (x264) and hitting o, it shows ff-h264(SW)

I was wondering if anyone could point me to how to get it to use hardware acceleration?

Tried several things from the web, but ended up having to install from scratch again, as it only produced a blank screen.

Any help appreciated

Thanks Derek