david@desktop:~$ LIBGL_DEBUG=v glxinfo | head -n3
libGL warning: 3D driver claims to not support visual 0x4b
libGL error: 
Can't open configuration file /etc/drirc: No such file or directory.
libGL error: 
Can't open configuration file /home/david/.drirc: No such file or directory.
name of display: :0.0
display: :0  screen: 0
direct rendering: Yes