Glxinfo

glxinfo
a command-line tool that can help you diagnose problems with your 3D acceleration setup. It can also provide additional helpful information for developers. Use man glxinfo to get an overview of its options.

How check which driver we use for graphic card ?
Example:

Nvidia driver -> closed driver

$ glxinfo | grep OpenGL OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce GTX 660/PCIe/SSE2 OpenGL core profile version string: 4.3.0 NVIDIA 331.49 OpenGL core profile shading language version string: 4.30 NVIDIA via Cg compiler OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: OpenGL version string: 4.4.0 NVIDIA 331.49 OpenGL shading language version string: 4.40 NVIDIA via Cg compiler OpenGL context flags: (none) OpenGL profile mask: (none) OpenGL extensions:

nouveau, Gallium from Mesa -> open driver

$ glxinfo | grep OpenGL OpenGL vendor string: nouveau OpenGL renderer string: Gallium 0.4 on NVE6 OpenGL core profile version string: 3.1 (Core Profile) Mesa 9.2.5 OpenGL core profile shading language version string: 1.40 OpenGL core profile context flags: (none) OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 9.2.5 OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions:

Intel driver from Mesa -> open driver
$ glxinfo | grep OpenGL OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Desktop OpenGL core profile version string: 3.3 (Core Profile) Mesa 11.0.6 OpenGL core profile shading language version string: 3.30 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 11.0.6 OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions: OpenGL ES profile version string: OpenGL ES 3.0 Mesa 11.0.6 OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.00 OpenGL ES profile extensions:

Where this app is ?
In 32 bit system exist 2 version ( glxinfo and glxinfo2 ):

[.@localhost ~]$ rpm -qf /usr/bin/glxinfo glxinfo-8.0.1-1pclos2011

and

[.@localhost ~]$ rpm -qf /usr/bin/glxinfo2 VirtualGL-2.3-1pclos2013

To run this app, just run from terminal:

[.@localhost ~]$ glxinfo

or

[.@localhost ~]$ glxinfo2