What do you normally run to start minecraft from the terminal? I'll assume it's just minecraft, but if it is different just replace that part. Run: GALLIUM_HUD=fps,requested-VRAM+VRAM-usage,requested-GTT+GTT-usage,GPU-load,num-bytes-moved,buffer-wait-time,num-compilations+num-shaders-created minecraft If it works, you should see a bunch of graphs appears on the screen.