Genesis-Embodied-AI
Fixing OpenGL.error.Error when running Genesis quick start
Summary
Thanks for this awesome work! Im getting OpenGL.error.Error: Attempt to retrieve context when no valid context when running the quickstart code for genesis. My env is python 3.12 and ubuntu 22.04
The quick fix is to add set osmesa instead of egl. example:
PYOPENGL_PLATFORM=osmesa python test_gs.py
Error logs
(genesis) youliang@youliang-Precision-5690:~$ python test_gs.py
[Genesis] [18:19:55] [INFO] ╭───────────────────────────────────────────────────────────────────────╮
[Genesis] [18:19:55] [INFO] │┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈ Genesis ┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈┉┈│
[Genesis] [18:19:55] [INFO] ╰───────────────────────────────────────────────────────────────────────╯
[Genesis] [18:19:55] [INFO] Running on [Intel(R) Core(TM) Ultra 7 165H] with backend gs.cpu. Device memory: 62.26 GB.
[Genesis] [18:19:55] [INFO] 🚀 Genesis initialized. 🔖 version: 0.2.0, 🌱 seed: None, 📏 precision: '32', 🐛 debug: False, 🎨 theme: 'dark'.
[Genesis] [18:19:55] [INFO] Scene <a9eeac3> created.
[Genesis] [18:19:55] [INFO] Adding <gs.RigidEntity>. idx: 0, uid: <ec0dd58>, morph: <gs.morphs.Plane>, material: <gs.materials.Rigid>.
[Genesis] [18:19:55] [INFO] Adding <gs.RigidEntity>. idx: 1, uid: <e3074a9>, morph: <gs.morphs.MJCF(file='/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/assets/xml/franka_emika_panda/panda.xml')>, material: <gs.materials.Rigid>.
[Genesis] [18:19:56] [INFO] Building scene <a9eeac3>...
[Genesis] [18:19:59] [INFO] Compiling simulation kernels...
[Genesis] [18:20:03] [INFO] Building visualizer...
Exception in thread Thread-2 (_init_and_start_app):
Traceback (most recent call last):
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/threading.py", line 1075, in _bootstrap_inner
self.run()
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/threading.py", line 1012, in run
self._target(*self._args, **self._kwargs)
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/ext/pyrender/viewer.py", line 1149, in _init_and_start_app
pyglet.clock.tick()
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/pyglet/clock.py", line 528, in tick
return _default.tick(poll)
^^^^^^^^^^^^^^^^^^^
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/pyglet/clock.py", line 270, in tick
self.call_scheduled_functions(delta_t)
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/pyglet/clock.py", line 217, in call_scheduled_functions
item.func(now - item.last_ts, *item.args, **item.kwargs)
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/ext/pyrender/viewer.py", line 941, in _time_event
self.on_draw()
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/ext/pyrender/viewer.py", line 640, in on_draw
self._render()
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/ext/pyrender/viewer.py", line 1086, in _render
retval = renderer.render(self.scene, flags, seg_node_map=seg_node_map)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/ext/pyrender/renderer.py", line 141, in render
self._update_context(scene, flags)
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/ext/pyrender/renderer.py", line 899, in _update_context
p._add_to_context()
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/genesis/ext/pyrender/primitive.py", line 359, in _add_to_context
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, FLOAT_SZ * 3, ctypes.c_void_p(0))
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/OpenGL/latebind.py", line 63, in __call__
return self.wrapperFunction( self.baseFunction, *args, **named )
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/OpenGL/GL/VERSION/GL_2_0.py", line 469, in glVertexAttribPointer
contextdata.setValue( key, array )
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/OpenGL/contextdata.py", line 58, in setValue
context = getContext( context )
^^^^^^^^^^^^^^^^^^^^^
File "/home/youliang/miniconda3/envs/genesis/lib/python3.12/site-packages/OpenGL/contextdata.py", line 40, in getContext
raise error.Error(
OpenGL.error.Error: Attempt to retrieve context when no valid context
In Python 3.11 on Ubuntu 22.04, I encountered the following error with OSMesa:
ImportError: Cannot use EGL rendering platform. The PYOPENGL_PLATFORM environment variable is set to {!r} (should be either unset or 'egl').
To resolve this, I disabled the viewer and visualized the rendered RGB and depth using an offscreen renderer. I hope this helps others facing the same issue :)
scene = gs.Scene(show_viewer=False)
cam = scene.add_camera(
res=(640, 480), pos=(2.5, 0.0, 2.0), lookat=(0, 0, 0.8), fov=30, GUI=False
)
for i in range(1000):
rgb, depth, _, _ = cam.render(depth=True)
Actually, I adopt the solution to add set osmesa instead of egl but have no use, then I change PyOpenGL to 3.1.5 version and then fixed this error ...
In Python
3.11on Ubuntu 22.04, I encountered the following error with OSMesa:ImportError: Cannot use EGL rendering platform. The PYOPENGL_PLATFORM environment variable is set to {!r} (should be either unset or 'egl').To resolve this, I disabled the viewer and visualized the rendered RGB and depth using an offscreen renderer. I hope this helps others facing the same issue :)
scene = gs.Scene(show_viewer=False) cam = scene.add_camera( res=(640, 480), pos=(2.5, 0.0, 2.0), lookat=(0, 0, 0.8), fov=30, GUI=False ) for i in range(1000): rgb, depth, _, _ = cam.render(depth=True)
I found that use 'glx' and setting the MuJoCo GL by export MUJOCO_GL=glx could solve the error like this for me (ubuntu 20.04)
Can confirm setting PYOPENGL_PLATFORM fixes it for me as well (Ubuntu 24.04, Python 3.12). By default, the variable did not have any value; setting it to either "glx" or "x11" fixes the problem (but "egl" doesn't work). Perhaps a Wayland-associated issue?
