$ pkg_info | grep libGL
libGL-7.4.4 OpenGL library that renders using GLX or DRI
libGLU-7.4.4 OpenGL utility library
If it's less than libGL-7.6.1, you will need to set that variable in /etc/make.conf and rebuilds those ports that I mentioned above.
WITHOUT_NOUVEAU=yes
$ glxinfo | grep -i render
IRQ's not enabled, falling back to busy waits: 2 0
direct rendering: Yes
OpenGL renderer string: Mesa DRI R600 (RV610 94C9) 20090101 x86/MMX/SSE2 TCL
Failed to activate desktop effects using the given configuration options. Settings will be reverted to their previous values.
Check your X configuration. You may also consider changing advanced options, especially changing the compositing type.
Option "AIGLX" "on"