dri conf

.drirc

<driconf>
   <device screen="0" driver="nouveau">
      <application name="all">
         <!-- Always synchronize with vertical refresh to avoid tearing -->
         <option name="vblank_mode" value="0"/>
         
          <option name="force_glsl_extensions_warn" value="true" />
          <option name="disable_glsl_line_continuations" value="true" />
          <option name="disable_blend_func_extended" value="true" />
          <option name="disable_shader_bit_encoding" value="true" />
         
         
      </application>
      <application name="glxgears" executable="glxgears">
         <!-- glxgears should not synchronize with vertical refresh, show full fps -->
         <option name="vblank_mode" value="1"/>
      </application>
<!--
      <application name="tuxracer" executable="tuxracer">
         <option name="tcl_mode" value="0"/>
      </application>
-->
   </device>
</driconf>