BTW, I got this from "ls /dev/dri/"
And as for "cat /sys/kernel/debug/dri/0/i915_frequency_info" I got this
There is something wrong with is isn't it? The Plex works fine but it can't handle any hardware transcode. For example when MPEG2 from a DVDRIP needs to be transcoded, it just stuck, but the machine won't reboot nor crash only the video just not gonna play. So as VC-1 videos.