i have latest raspian image (2014-12-22) and did rpi-update.
I've installed mesa-utils with sudo apt-get install mesa-utils. and then i ran the 'glxgears' command.
i get the rotating gears to show in a window, but performance is slow. 20 fps
Q: Can GLX performance be improved on the r-pi?
more GLX info inside my post over in the 'advanced user' forum http://www.raspberrypi.org/forums/viewt ... 4&p=661104
(my apologies for cross posting. sorry )