HDMI Monitors and Laptops

I have been using Zwift for the last 2 years or so with a mid range windows 11 laptop using medium resolution and a wahoo kickr. I have done workouts both with and without erg, free rides and races with no problems. Recently I purchased a Dell 22 inch monitor connected through hdmi. It works fine for free rides and workouts with medium resolution. But for erg mode and races it drops the power connection between the kickr and the laptop so I have zero power even though I am peddling – it doesn’t last long before it returns. My assumption is that adding the monitor require more computing power and my laptop is not powerful enough. Is this correct? If so would using low resolution help?