I have a dell xps 15 laptop. I have two usb-c to hdmi adapters. Neither of them work. The adapters have a light on them, and when plugged in to the laptop, it does not come on for either of them. The display does not detect the hdmi signal either. When I plugin the adapter though, the laptop does detect it because it plays that audio sound when you plug in a device. When plugging directly from hdmi->hdmi, this does not work either.