Hybrid Graphics With Nouveau HDMI Setup

Hello

I have an nvidia optimus setup with red hat 7.4 workstation, i was wondering if anyone can tell me how to setup a connection via HDMI with audio to a UHD TV.

If i plug in the HDMI it is not detected, naturally because the discrete graphics card is off, id like to have a script of a keyboard switch to turn the discrete card and restart x on and off.

Is there a way to do this ?

Kind Regards

Ryan