Error initializing egl inside docker container based on libglvnd

Created by: mmmikael

I’m getting this error when calling eglInitialize in a cudagl docker container:

Traceback (most recent call last):
  File "egl_context.py", line 12, in <module>
    egl.eglInitialize(egl_display, pointer(major), pointer(minor))
  File "/usr/local/lib/python3.6/dist-packages/PyOpenGL-3.1.3b2-py3.6.egg/OpenGL/platform/baseplatform.py", line 409, in __call__
    return self( *args, **named )
  File "/usr/local/lib/python3.6/dist-packages/PyOpenGL-3.1.3b2-py3.6.egg/OpenGL/error.py", line 232, in glCheckError
    baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
	err = 12289,
	baseOperation = eglInitialize,
	cArguments = (
		<OpenGL._opaque.EGLDisplay_pointer object at 0x7fef5cc2ae18>,
		<OpenGL.arrays.arraydatatype.LP_c_int object at 0x7fef59c22ea0>,
		<OpenGL.arrays.arraydatatype.LP_c_int object at 0x7fef59c22f28>,
	),
	result = 0
)

Any idea why this is happening?

I’m initializing egl this way:

import os
from ctypes import pointer

os.environ["PYOPENGL_PLATFORM"] = "egl"

import OpenGL.GL as gl
import OpenGL.EGL as egl

egl_display = egl.eglGetDisplay(egl.EGL_DEFAULT_DISPLAY)
major, minor = egl.EGLint(), egl.EGLint()
egl.eglInitialize(egl_display, pointer(major), pointer(minor))