Comment 15 for bug 1257434

I got the result of one, was trying to do when logged in so I could C&P but a real hassle as windows open on top of each other, ect.

update-alternatives --display x86_64-linux-gnu_gl_conf
update-alternatives: warning: alternative /usr/lib/nvidia-331-prime/ld.so.conf (part of link group x86_64-linux-gnu_gl_conf) doesn't exist; removing from list of alternatives
x86_64-linux-gnu_gl_conf - auto mode
  link currently points to /usr/lib/nvidia-331-prime/ld.so.conf
/usr/lib/x86_64-linux-gnu/mesa/ld.so.conf - priority 500
  slave x86_64-linux-gnu_xorg_extra_modules: /usr/lib/x86_64-linux-gnu/xorg/x11-extra-modules
Current 'best' version is '/usr/lib/x86_64-linux-gnu/mesa/ld.so.conf'.