Installation of IntelMediaSDK 2018R1, no /dev/dri/.

I have successfully installed Media SDK Essential 2018 R1, and also compiled libva-utils. Now the vainfo command was working fine. But after rebooting the machine vainfo is showing "can't initialize display" and there is no "/dev/dri/{card0,render*}". Also before booting the machine there was module i915, drm, and drm_kms_helper. But after rebooting there is one more module loaded "drm_ukmd". I think due to this module problem is occurring. Is there any solution to recreate "/dev/dri/".