That is the case. I recommend buying the Pi5 supply, it's very high quality, and very reasonably priced.I do not understand the reason for your cynicism. In any case, basically, because the 5volt-5amp, even though a PD mode, is an odd one, "most of" the PD supplies in the market does not actually support it. That is what i was trying to understand.The Pi 5 does not "ask" as it is the sink. The source offers (advertises) available modes and the sink selects from the offered modes. As for this functioning, connect a Pi 5 to the official adaptor and note that the USB-PD negotiation results in 5V@5A. Plug the official power supply into something which perfers one of the higher voltage modes and note that tah da it gets the higher voltage mode. Liz recently mentioned that she charges her MacBook with the official power supply, but she might just be part of the conspiracy, as an insider and all that. Plug it into a dumb (standard USB) device and observe that it gets 5V@3V.Has anybody tried to power the Pi-5 with a "third party" power supply which supports PD? And could those chargers actually supply the 5 amps that the Pi-5 needs? The question is, can the Pi-5 and a third party PD supported power delivery system actually "negotiate and agree" upon what they Pi-5 is asking for. Or does it even ask for it?
This does rest on believing that the USB-PD compliance stamped on the power supply and claimed by RPL is really a thing and that you can trust the claims made by the second higher voltage loving test sink. Maybe it is all alien mind control...
Alternatively don the oh so shiney protective headgear and offer alternate "theories".
Statistics: Posted by jamesh — Sat Apr 06, 2024 5:47 am