Can't run - OpenGl Error

I just installed Cocos2d-x (Version: cocos2d-2.1beta3-x-2.1.1) from github’s master branch.

When I try to run the samples, i got the following message:

cocos2d-x debug info [Ready for GLSL]
cocos2d-x debug info [OpenGL 2.0 not supported]
cocos2d-x debug info [cocos2d: cocos2d-2.1beta3-x-2.1.1]
Segmentation Fault (Core dumped)

I’m using Ubuntu 12.04 LTS. The Android build is Ok.

Can someone help me?