USB C PD is a negotiated protocol, the controlling chipset is not supposed to set VBUS to above 5V unless the sink explicitly asks for it. Unlike what people ar

USB C PD is a negotiated protocol, the controlling chipset is not supposed to set VBUS to above 5V unless the sink explicitly asks for it. Unlike what people are saying here, it's not a matter of a simple component shorting out, the USB C controller must have a firmware error for this. That's the theory. In practice, really, wtf is going on there, I have thought laptops didn't implement USB PD as a power source at all?? Why would the VBUS of different ports be connected together?