My laptop was not working with oculus link on USB 3.0 cable, but the connection test was succeed.
I using lenovo legion 5 laptop. that has ryzen 4800h APU and rtx 2060 discrete graphics.
after several trys, finally I can success the oculus link with usb cable on my laptop.
belows works for me.
Open the lenovo vantage app and disable the hybrid mode setting.
that means laptop working with internal graphic card for battery saving when not running games.
I think that If the others laptops having such that setting, it maybe cause same problem...