pyglet.gl.ContextException: Could not create GL context

Hi, I’m trying to run the following code:

import trimesh
import pyrender
tm = trimesh.load('/home/henry/Downloads/fuze.obj')
pymesh = pyrender.Mesh.from_trimesh(tm)

scene = pyrender.Scene()
scene.add(pymesh)
pyrender.Viewer(scene, use_raymond_lighting=True)

And I get the following error:

File "generate_pose_dataset.py", line 172, in mesh_render
    pyrender.Viewer(scene, use_raymond_lighting=True)
  File "/usr/local/lib/python2.7/dist-packages/pyrender/viewer.py", line 347, in __init__
    self._init_and_start_app()
  File "/usr/local/lib/python2.7/dist-packages/pyrender/viewer.py", line 995, in _init_and_start_app
    height=self._viewport_size[1])
  File "/usr/local/lib/python2.7/dist-packages/pyglet/window/xlib/__init__.py", line 170, in __init__
    super(XlibWindow, self).__init__(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/window/__init__.py", line 595, in __init__
    context = config.create_context(gl.current_context)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/gl/xlib.py", line 216, in create_context
    return XlibContextARB(self, share)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/gl/xlib.py", line 322, in __init__
    super(XlibContext13, self).__init__(config, share)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/gl/xlib.py", line 230, in __init__
    raise gl.ContextException('Could not create GL context')
pyglet.gl.ContextException: Could not create GL context

My computer shows that PyOpenGL 3.1.0, PyOpenGL_accelerate 3.1.0, and pyglet appear to be correctly installed.

To test pyglet externally from pyrender, I ran the following code:

import pyglet
pyglet.window.Window()

and a window opens as expected.

Any ideas why this error is occurring?

I’m running 16.04 with 64 bit.

Thanks! Henry C.