Run demo to meet xcb error

[vigorbird]

Hi Davis Rempe, I am focusing your work since your last paper "Contact and Human Dynamics from Monocular Video". Thanks for your great work to human estimation area.
I run demo code and meet two problems. The first problem is about opengl version which leads to pyrender failure, I solve this problem by editing opengl version.
The second problem is about "xcb" library. After optimization process, I want to visualize final results and ubuntu system reports this error:

I search on the Internet, but can not find the solution.

[davrempe]

I have not seen this error before, but I have run into rendering issues in the past when the version of pyrender and other related libraries are not compatible. Here the pip list for my working environment (on Ubuntu 16.04). Try to use the same versions of pyrender (0.1.45), PyOpenGL (3.1.0), and pyglet (1.5.15) as listed here.

You might also want to make sure "xcb" is updated. Also just to double check, your system has a display with an X server running? I have not tried running rendering on a headless server, so you might run into issues if this is what you're trying.

[vigorbird]

Thanks for your reply. I edit pyrender's constants.py file to solve the xcb problem

But I meet the new problem during rendring results. I think pyrender is not robust to run on all of computers. This is my error:
"error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, and 3.00 ES\n'"