When I try to run glest on Xubuntu GNU/Linux 9.04 in a computer without 3D graphics acceleration, it returns:
Exception: Your system supports OpenGL version "1.2 Mesa 7.4"
Glest needs at least version 1.3 to work
You may solve this problem by installing your latest video card drivers
I don't know if the problem is to have only 2D graphics acceleration (and the message is wrong), or Xubuntu really comes with that Mesa's version.