kevin@debian:~$ LIBGL_DEBUG=verbose glxinfo | grep direct
libGL: XF86DRIGetClientDriverName: 5.2.0 r300 (screen 0)
libGL: OpenDriver: trying /usr/lib32/dri/r300_dri.so
libGL error: dlopen /usr/lib32/dri/r300_dri.so failed (/usr/lib32/dri/r300_dri.so: wrong ELF class: ELFCLASS32)
libGL: OpenDriver: trying /usr/lib64/dri/r300_dri.so
libGL error: dlopen /usr/lib64/dri/r300_dri.so failed (/usr/lib64/dri/r300_dri.so: undefined symbol: _glapi_Dispatch)
libGL error: unable to load driver: r300_dri.so
direct rendering: No (If you want to find out why, try setting LIBGL_DEBUG=verbose)