I've added the user to the video group. Here is my processor, it supports QuickSync.
http://ark.intel.com/products/50067/Intel-Core-i7-2720QM-Processor-6M-Cache-up-to-3_30-GHz
$ ls -alh /dev/dri
Total 0
drwxr-xr-x 2 root root 140 May 23 22:03 .
drwxr-xr-x 20 root root 4.7K May 23 22:21 ..
crw-rw----+ 1 root video 226, 0 May 23 22:03 card0
crw-rw----+ 1 root video 226, 1 May 23 22:03 card1
crw-rw---- 1 root video 226, 64 May 23 22:03 controlD64
crw-rw----+ 1 root video 226, 128 May 23 22:03 renderD128
crw-rw----+ 1 root video 226, 129 May 23 22:03 renderD129