I'm using xming as well.

glxinfo reports

  OpenGL vendor string: VMware, Inc.
  OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.4, 256  bits)
  OpenGL version string: 2.1 Mesa 10.1.3
  OpenGL shading language version string: 1.30

glxgears works for about a second, then crashes:

  XIO:  fatal IO error 11 (Resource temporarily unavailable) on X  server "localhost:0.0"
         after 732 requests (732 known processed) with 0 events remaining.

When i run it from strace, it keeps running.

Thanks! It's great that it's works.