Avoid libGL error?

Hi All,

When I run mathematica I have the following error message:

[lsaavedr@xxxx ~]$ mathematica
libGL error: failed to open drm device: No such file or directory
libGL error: failed to load driver: i965

mathematica version: 6.0.2.0

OS: redhat 6.8/ kernel 2.6.32-642.11.1.el6.x86_64

libGL : mesa-libGL-11.0.7-4.el6.x86_64 / mesa-libGLU-11.0.7-4.el6.x86_64

any clue?

Thanks,