?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
glXGetConfig () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
GLScreen::GLScreen(CompScreen*) () from /usr/lib/compiz/libopengl.so
PluginClassHandler<GLScreen, CompScreen, 4>::get(CompScreen*) () from /usr/lib/compiz/libopengl.so