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I type this LIBGL_DEBUG=verbose glxinfo because its supposed to help debug video problems and I get this

What does it all mean? Where can I learn more? What do you do with it?

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up vote 2 down vote accepted

The provided information is useful for users troubleshooting the OpenGL library and producing information that can help developers debugging the OpenGL library.

If defined debug information will be printed to stderr. If set to verbose additional information will be printed.


The command you are typing in: LIBGL_DEBUG=verbose glxinfo defines an environment variable LIBGL_DEBUG and sets it value to verbose. Then glxinfo starts and check certain environment variables and outputs more debug info in your case. After execution of program glxinfo this environment variable is set back to its prior value (most like it is undefined then).

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