Direct rendering is only working for root on my system (unstable/4.1.0). The permissions for the DRI device files are: /dev/dri: drwxrwx--- 2 root root 4096 Aug 1 15:22 dri /dev/dri/*: crw-rw---- 1 root root 10, 63 Aug 1 15:22 card0 glxinfo as non-root: will@dogfox:~$ glxinfo name of display: :0.0 libGL error: failed to open DRM: Operation not permitted libGL error: reverting to (slow) indirect rendering Are my permissions incorrect?