More INFO

Running driconf, I see the following message:

Xlib:  extension "XFree86-DRI" missing on display ":0.0".

However, inside the xorg.0.log, I see:

(II) AIGLX: enabled GLX_MESA_copy_sub_buffer
(II) AIGLX: enabled GLX_SGI_swap_control and GLX_MESA_swap_control
(II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects
(II) AIGLX: Loaded and initialized /usr/lib/dri/i965_dri.so
(II) GLX: Initialized DRI2 GL provider for screen 0

Any help?

Thank you,
Massimiliano