As specified in [1], Nvidia's official driver has a --no-opengl-files option, this prevents nvidia from overwriting intel's opengl files on a dual card (one intel integrated and one nvidia dedicated) system.

This is important for dual card system (which is very common), because:

1. It allows applications that relies on opengl to work correctly. If you have both intel's and nvidia's dirver installed, and config X to use intel to do the display, then application such as glxinfo would not work.

2. Solve bugs. On my computer, the KDE application launcher takes ages to popup, if I uninstall the nvidia driver, the problem is gone, which leads to suspect that this is caused by the overwriting.

3. Improved performance. I use intel for display and nvidia for computation, (configed as mentioned in 1), if I uninstall the nvidia driver, which enables intel's opengl, I experienced noticeable performance boost: chromium responds faster, and application "opens" faster, (no benchmark data, but feels so).


[1] https://us.download.nvidia.com/XFree86/Linux-x86/295.59/README/optimus.html