Problem running OpenGL program in a virtual machine

In case you encounter the following issue when running OpenGL program in a virtual machine

OpenGL Warning: XGetVisualInfo returned 0 visuals for 0x180fb10
OpenGL Warning: Retry with 0x8002 returned 0 visuals
Segmentation fault (core dumped)

You may set the LIBGL_ALWAYS_INDIRECT environment variable to 1 before running my GLUT programs, as follows.

export LIBGL_ALWAYS_INDIRECT=1

Reference

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