Segmentation fault (core dumped) with image observation offscreen rendering

[chrisgao99]

Hello,

This is a problem I met only with the headless remote server R, but it works fine on server C. The problem is whenenver I set image_observation True, use_render False, it will raise this error:

Current thread 0x00007fa5e4c07400 (most recent call first):
  File "/home/baz7dy/.conda/envs/ipenv1/lib/python3.9/site-packages/direct/showbase/ShowBase.py", line 890 in _doOpenWindow
  File "/home/baz7dy/.conda/envs/ipenv1/lib/python3.9/site-packages/direct/showbase/ShowBase.py", line 753 in <lambda>
  File "/home/baz7dy/.conda/envs/ipenv1/lib/python3.9/site-packages/direct/showbase/ShowBase.py", line 775 in openWindow
  File "/home/baz7dy/.conda/envs/ipenv1/lib/python3.9/site-packages/direct/showbase/ShowBase.py", line 1071 in openMainWindow
  File "/home/baz7dy/.conda/envs/ipenv1/lib/python3.9/site-packages/direct/showbase/ShowBase.py", line 1035 in openDefaultWindow
  File "/home/baz7dy/.conda/envs/ipenv1/lib/python3.9/site-packages/direct/showbase/ShowBase.py", line 342 in __init__
  File "/sfs/weka/scratch/baz7dy/INTP/metadrive/metadrive/engine/core/engine_core.py", line 208 in __init__
  File "/sfs/weka/scratch/baz7dy/INTP/metadrive/metadrive/engine/base_engine.py", line 55 in __init__
  File "/sfs/weka/scratch/baz7dy/INTP/metadrive/metadrive/engine/engine_utils.py", line 38 in initialize_engine
  File "/sfs/weka/scratch/baz7dy/INTP/metadrive/metadrive/engine/engine_utils.py", line 17 in _fix_offscreen_rendering
  File "/sfs/weka/scratch/baz7dy/INTP/metadrive/metadrive/engine/engine_utils.py", line 33 in initialize_engine
  File "/sfs/weka/scratch/baz7dy/INTP/metadrive/metadrive/envs/base_env.py", line 412 in lazy_init
  File "/sfs/weka/scratch/baz7dy/INTP/metadrive/metadrive/envs/base_env.py", line 520 in reset
  File "/sfs/weka/scratch/baz7dy/INTP/mdtrail/try_snet.py", line 29 in reset
  File "/sfs/weka/scratch/baz7dy/INTP/mdtrail/try_snet.py", line 69 in <module>
Segmentation fault (core dumped)

I found out that the error happens when it creates an offscreen window in ShowBase and I tried to print the inputs to prepare the difference between the two servers:

print("in showbase _doOpenWindow 886",pipe, name, 0, "fbprobs is: ", fbprops, "props is:", props,"flags is", flags)
win = self.graphicsEngine.makeOutput(pipe, name, 0, fbprops, props, flags)

>>>in showbase _doOpenWindow 886 <panda3d.core.GraphicsPipe object at 0x7fa4e0473f30> window1 0 fbprobs is:  depth_bits=1 color_bits=3 red_bits=1 green_bits=1 blue_bits=1 alpha_bits=1 multisamples=8 back_buffers=1 force_hardware  props is: origin=(-2, -2) size=(1, 1) title="MetaDrive v0.4.2.3" !undecorated !fixed_size !fullscreen open !cursor_hidden absolute  flags is 2052

But I didn't find any difference so the input configs are not the reason it fails.

I guess the reason may be because of driver and opengl compatibility but I'm not sure where to start. Could you provide any ideas or suggestions for solving the problem? I would truly appreciate it.