Running into "Segmentation fault" when creating glfw window

[ming-c]

I couldn't run the script because of a Segmentation Fault caused by glfw.CreateWindow(1, 1, "", None) in file glfw_off_screen_context.py (line 14).

The message in the terminal is

Process finished with exit code 139 (interrupted by signal 11: SIGSEGV)

System Info

• Linux version: 14.04, with local display connected.
• Python version: 2.7 (system interpreter, no virtualenv)
• nvidia-smi output:

  +-----------------------------------------------------------------------------+
  | NVIDIA-SMI 390.87                 Driver Version: 390.87                    |
  |-------------------------------+----------------------+----------------------+
  | GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
  | Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
  |===============================+======================+======================|
  |   0  GeForce GTX 770     Off  | 00000000:01:00.0 N/A |                  N/A |
  | 17%   40C    P8    N/A /  N/A |    351MiB /  4034MiB |     N/A      Default |
  +-------------------------------+----------------------+----------------------+
  |   1  GeForce GTX 1070    Off  | 00000000:02:00.0 Off |                  N/A |
  |  0%   38C    P8     6W / 180W |      2MiB /  8119MiB |      0%      Default |
  +-------------------------------+----------------------+----------------------+

• glmark2 output:

  =======================================================
      glmark2 2012.08
  =======================================================
      OpenGL Information
      GL_VENDOR:     NVIDIA Corporation
      GL_RENDERER:   GeForce GTX 770/PCIe/SSE2
      GL_VERSION:    4.6.0 NVIDIA 390.87
  =======================================================
  

• glxinfo output:

  name of display: :0
  display: :0  screen: 0
  direct rendering: Yes
  server glx vendor string: NVIDIA Corporation
  server glx version string: 1.4
  client glx vendor string: NVIDIA Corporation
  client glx version string: 1.4
  GLX version: 1.4
  OpenGL vendor string: NVIDIA Corporation
  OpenGL renderer string: GeForce GTX 770/PCIe/SSE2
  OpenGL core profile version string: 4.3.0 NVIDIA 390.87
  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 version string: 4.6.0 NVIDIA 390.87
  OpenGL shading language version string: 4.60 NVIDIA
  OpenGL context flags: (none)
  OpenGL profile mask: (none)

• libglfw3 version: 3.2.1 (Compile from source using cmake)
• pip show cyglfw3 output:

  Name: cyglfw3
  Version: 3.1.0.2
  Summary: Python bindings for GLFW 3+ using Cython
  Home-page: http://github.com/adamlwgriffiths/cyglfw3
  Author: Adam Griffiths
  Author-email: UNKNOWN
  License: BSD
  Location: /usr/local/lib/python2.7/dist-packages
  Requires: Cython

• the cfg file:

  MODEL_PATH: /home/me/HardDisk/Datasets/6DB/public/datasets/hinterstoisser/models/obj_02.ply
  BACKGROUND_IMAGES_GLOB: /home/me/HardDisk/Datasets/VOC/VOCdevkit/VOC2007/JPEGImages/

  (the rest remains unchanged)

And actually it dose't seem like creating a window here is the key to the problem, 'cause I also create a python script with following lines:

import logging as log
import os

import os
import numpy as np
from OpenGL.GL import *

import gl_utils as gu
from pysixd import misc

import numpy as np
import time
import hashlib
import glob
import os
import progressbar
import cv2

from OpenGL.GL import *
import cyglfw3 as glfw
class OffscreenContext(object):
    def __init__(self):
        assert glfw.Init(), 'Glfw Init failed!'
        glfw.WindowHint(glfw.VISIBLE, False);
        self._offscreen_context = glfw.CreateWindow(1, 1, "", None)
        assert self._offscreen_context, 'Could not create Offscreen Context!'
        glfw.MakeContextCurrent(self._offscreen_context)
        print("All good!")

if __name__ == '__main__':
    context = OffscreenContext()

This file runs perfectly fine without any segmentation fault.

Any suggestion?

Cheers

[ming-c]

Get around it by commenting line assert glfw.Init(), Glfw Init failed! (line 12 in glfw_offscreen_context.py). It's probably not the ultimate (and correct) solution but anyway the Segment fault didn't show up anymore.