How to use Intel HW Accelerators

I followed the steps mentioned in the getting started guide for installing the Intel media server studio SDK.

Version used: MediaServerStudioEssentials2016.tar.gz

Here are details about system:

 x86_64 CPU op-mode(s): 32-bit, 64-bit 

Model name: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz (SKYLAKE PROCESSOR)

Skylake PC

CentOS Linux release 7.1.1503

I checked few basic steps like :

uname –r

checked booted into the correct kernel or not.

lspci –nn | grep VGA

Checked if the Intel® Integrated Graphics

lsmod | grep i915

Checked if the i915 DRM module is installed

I find some problem while running vainfo as follow.

[skylake@localhost user]$ vainfo
error: failed to initialize display
Aborted (core dumped)

How to solve above problem, can any one please help me ..

Thanks&Regards,