# ls -l /dev/dri/
total 0
crw-rw----+ 1 root video 226,   0 Oct 29 23:25 card0
crw-rw----+ 1 root video 226,   1 Oct 29 23:25 card1
crw-rw----  1 root video 226,  64 Oct 29 23:25 controlD64
crw-rw----  1 root video 226,  65 Oct 29 23:25 controlD65
crw-rw----  1 root video 226, 128 Oct 29 23:25 renderD128
crw-rw----  1 root video 226, 129 Oct 29 23:25 renderD129