On ElementryOs, starting qb64 gives the following warnings:
- me@me-VirtualBox:~/Downloads/qb64$ ./run_qb64.sh 
- me@me-VirtualBox:~/Downloads/qb64$ OpenGL Warning: glXChooseVisual: bad attrib=0x186a0, ignoring 
- OpenGL Warning: glXChooseVisual: bad attrib=0x186a1, ignoring 
- OpenGL Warning: glXChooseVisual: bad attrib=0x186a0, ignoring 
- OpenGL Warning: glXChooseVisual: bad attrib=0x186a1, ignoring 
- OpenGL Warning: vboxCall failed with VBox status code VERR_BUFFER_OVERFLOW 
Things still start and run, however.  I just thought I'd share in case anybody had an idea what these were for and why they show up.
Missed one:
OpenGL Warning: No pincher, please call crStateSetCurrentPointers() in your SPU