Handling Oculus connected to non-primary graphics device

Hi

The app that I'm developing has some graphics problems if the Oculus Rift is connected to the dedicated graphics card but the PC's integrated graphics are also used as the primary device in Windows.
I noticed that other apps such as Medium and Quill don't launch in this setup (one shows an error message, the other crashes)
Are PC setups like this considered compliant? Can anyone suggest a reliable way of detecting this kind of setup so that I can show a friendly error message?

thanks