Comment # 13 on bug 55217 from Michael Lange

(In reply to comment #9)
> 
> E.g., LD_LIBRARY_PATH=<directory where libGL.so.1 lives>
> LIBGL_DRIVERS_PATH=<directory where r600_dri.so lives> glxgears
> 
> will run glxgears with your new Mesa.

thanks, this works

currently bisecting mesa - two steps to go