Looking for GLFW sample code using latest SDK (1.35)

OpenGL has an inherent limitation where you cannot explicitly specify in the API which GPU to use. Instead, the GPU used will happen to default to display the desktop window is being created on. The ovr_Create API will return a LUID that you can use to figure out which GPU to use and then generate the desktop window on that GPU making sure they're the same. This of course assumes you have a display attached to that GPU which isn't always the case with a dual GPU setup. See the following suggestion to work around that.

If you are using a laptop which uses NVidia's Optimus where the main laptop display is hooked up to the Intel GPU while HDMI port the HMD is connected on uses the discrete NVidia GPU, then you will have to override the default GPU using the NVidia control panel's "Manage 3D settings". This can be tweaked under the "OpenGL rendering GPU" field. This will force your application to use the NVidia GPU even though you have created the window on the Intel-GPU-connected display. In the NVidia control panel you can also create an app profile to make sure only your app is using this override scheme.