[root@localhost ~]# glxinfo | grep renderer
libGL error: failed to load driver: radeon
libGL error: Try again with LIBGL_DEBUG=verbose for more details.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.3, 128 bits)
[root@localhost ~]# export LIBGL_DEBUG=verbose
[root@localhost ~]# glxinfo | grep renderer
libGL: OpenDriver: trying /usr/lib64/dri/tls/radeon_dri.so
libGL: OpenDriver: trying /usr/lib64/dri/radeon_dri.so
libGL error: failed to create dri screen
libGL error: failed to load driver: radeon
libGL: OpenDriver: trying /usr/lib64/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib64/dri/swrast_dri.so
libGL: Can't open configuration file /root/.drirc: No such file or directory.
libGL: Can't open configuration file /root/.drirc: No such file or directory.
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.3, 128 bits)
[root@localhost ~]# ls /usr/lib64/dri/
i915_dri.so           r200_dri.so           radeonsi_dri.so
i965_dri.so           r300_dri.so           swrast_dri.so
nouveau_dri.so        r600_dri.so           vmwgfx_dri.so
nouveau_vieux_dri.so  radeon_dri.so         
[root@localhost ~]#