On a Fedora rawhide system, /dev/dri is assigned permissions of 750 instead of 755 resulting in:
OpenGL renderer string: Software Rasterizer
as opposed to
OpenGL renderer string: Mesa DRI R600 (RV630 9588) 20090101 TCL DRI2
[andrew@790x ~]$ rpm -qa|grep Console
Please report this against udev, as CK does not include any udev rules itself.