Comment 7 for bug 660443

For those affected and do not use a solution like Bumblebee
(https://github.com/Bumblebee-Project/Bumblebee), please run:

    update-alternatives --force --set i386-linux-gnu_gl_conf /usr/lib/i386-linux-gnu/mesa/ld.so.conf

If you're running a 64-bit system, run:

    update-alternatives --force --set x86_64-linux-gnu_gl_conf /usr/lib/x86_64-linux-gnu/mesa/ld.so.conf

This will set the default OpenGL library back to Mesa. Using a custom Xorg configuration file, you can still utilize the nvidia drivers. Note that Optimus is not supported for Linux so you've to use a solution like Bumblebee or hybrid-windump.