I do get direct rendering: yes from glxinfo. glxinfo | grep opengl returns:
...so it seems like OpenGL is at least being loaded properly. Are there any basic/very compatible OpenGL games/tests I can install and run quickly?
OpenGL vendor string: Tungsten Graphics, Inc
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Mobile
OpenGL version string: 3.0 Mesa 8.0.2
OpenGL shading language version string: 1.30
Edit: Also, mesa-utils was not installed on my machine and I had to install that to run glxinfo. Not sure if that tells you anything.