AIGLX: 3D driver claims to not support visual 0x23 If you have direct rendering enabled and Your screen blinks with black triangles Warning message: (WW) AIGLX: 3D driver claims to not support visual 0x23 in /var.log/Xorg.0.log means that i912_dri.so is lacking of something. I found that Xorg is looking first in /usr/X11R6/lib/modules/dri whereas new is in /usr/lib/dri ln -s /usr/lib/dri /usr/X11R6/lib/modules/dri Should fix the problem