i965_drv_video.so not found on CentOS 7.1

Hi there,

We tried to switch our development from SLES11 / MSS R3 to CentOS 7.1 / MSS R6. While I am setting up CentOS 7.1, I found that the MSDK won't run. libva is looking for /usr/lib64/dri/i965_drv_video.so which is not found on the system. 
I workaround the issue by soft-link i965_drv_video.so to iHD_drv_video.so. Then, everything works!

Two questions:
1) Do you see any problem of pointing the drive to iHD_drv_video.so?
2) Why would libva look for i965_drv_video.so? Am I missing some components during the installation?

Here is my system information:
OS: CentOS 7.1
Kernel: 3.10.0-229.1.2.39163.MSSr4.el7.centos.x86_64
MSDK: Media Server Studio Essentials 2015 R6
CPU: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz

Thanks,
Ken