vblank_mode=0 glxgears
root@slitaz:~# glxinfo | egrep 'render|version'
direct rendering: Yes
server glx version string: 1.4
client glx version string: 1.4
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
GLX version: 1.4
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
Extended renderer info (GLX_MESA_query_renderer):
Max core profile version: 4.5
Max compat profile version: 3.0
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.1
OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop x86/MMX/SSE2
OpenGL core profile version string: 4.5 (Core Profile) Mesa 17.3.4
OpenGL core profile shading language version string: 4.50
GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
GL_MESA_texture_signed_rgba, GL_NV_conditional_render, GL_NV_depth_clamp,
OpenGL version string: 3.0 Mesa 17.3.4
OpenGL shading language version string: 1.30
GL_ARB_compute_shader, GL_ARB_conditional_render_inverted,
GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_light_max_exponent,
OpenGL ES profile version string: OpenGL ES 3.1 Mesa 17.3.4
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
GL_OES_fbo_render_mipmap, GL_OES_geometry_point_size,
root@slitaz:~#
root@slitaz:~# uname -a
Linux slitaz 4.17.7-slitaz #2 SMP Sat Jul 21 08:34:51 Europe 2018 i686 GNU/Linux
root@slitaz:~#
root@slitaz:~# vblank_mode=0 glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
37499 frames in 5.0 seconds = 7499.718 FPS
40807 frames in 5.0 seconds = 8161.307 FPS
40792 frames in 5.0 seconds = 8158.356 FPS
41047 frames in 5.0 seconds = 8209.256 FPS
root@slitaz:~#
root@slitaz:~# grep -i glx /var/log/Xorg.0.log
[ 146.808] (II) LoadModule: "glx"
[ 146.808] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 146.810] (II) Module glx: vendor="X.Org Foundation"
[ 147.074] (II) Initializing extension GLX
[ 147.080] (II) AIGLX: Loaded and initialized i965
[ 147.080] (II) GLX: Initialized DRI2 GL provider for screen 0
