$ glxinfo | grep -i vendor
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: Version 4 or later of flush extension not found
libGL error: failed to load driver: i915
libGL error: failed to open drm device: Permission denied
libGL error: failed to load driver: i965
server glx vendor string: SGI
client glx vendor string: Mesa Project and SGI
    Vendor: VMware, Inc. (0xffffffff)
OpenGL vendor string: VMware, Inc.