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Running over SSH

See original GitHub issue

Hi there, I am trying to run the environment over ssh on a linux server where I don’t have sudo rights, and I’m getting this error:

~/gym-miniworld/pytorch-a2c-ppo-acktr $ python main.py --algo ppo --num-frames 5000000 --num-processes 16 --num-steps 80 --lr 0.00005 --env-name MiniWorld-Hallway-v0
Traceback (most recent call last):
  File "main.py", line 17, in <module>
    from envs import make_vec_envs
  File "/home/ml/mklissa/gym-miniworld/pytorch-a2c-ppo-acktr/envs.py", line 28, in <module>
    import gym_miniworld
  File "/home/ml/mklissa/gym-miniworld/gym_miniworld/__init__.py", line 1, in <module>
    from . import miniworld
  File "/home/ml/mklissa/gym-miniworld/gym_miniworld/miniworld.py", line 7, in <module>
    from .opengl import *
  File "/home/ml/mklissa/gym-miniworld/gym_miniworld/opengl.py", line 5, in <module>
    from pyglet.gl import *
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/gl/__init__.py", line 239, in <module>
    import pyglet.window
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/window/__init__.py", line 1896, in <module>
    gl._create_shadow_window()
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/gl/__init__.py", line 208, in _create_shadow_window
    _shadow_window = Window(width=1, height=1, visible=False)
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/window/xlib/__init__.py", line 166, in __init__
    super(XlibWindow, self).__init__(*args, **kwargs)
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/window/__init__.py", line 501, in __init__
    display = get_platform().get_default_display()
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/window/__init__.py", line 1845, in get_default_display
    return pyglet.canvas.get_display()
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/canvas/__init__.py", line 82, in get_display
    return Display()
  File "/home/ml/mklissa/miniconda2/envs/kag/lib/python3.6/site-packages/pyglet/canvas/xlib.py", line 86, in __init__
    raise NoSuchDisplayException('Cannot connect to "%s"' % name)
pyglet.canvas.xlib.NoSuchDisplayException: Cannot connect to "None"

I’m not too sure how to resolve this

Thanks!

Issue Analytics

State:
Created 5 years ago
Comments:8 (4 by maintainers)

Top GitHub Comments

1reaction

maximecbcommented, Feb 22, 2019

That probably means glx is not installed. Should be a simple fix. Best of luck!

1reaction

maximecbcommented, Feb 21, 2019

Hi Martin,

In order to train over SSH, you need to create a virtual frame buffer to render into. This can be done using xvfb-run.

Example command: xvfb-run -a -s "-screen 0 1024x768x24 -ac +extension GLX +render -noreset" python3 main.py --algo ppo --num-processes 16 --num-steps 80 --lr 0.00005 --env-name MiniWorld-Hallway-v0

If this doesn’t work, or xvfb-run isn’t installed on the machines where you are training, you will need to communicate with the administrators and get them to install it. It’s a fairly standard tool.

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