Standards are a wonderful thing...there are so many to choose from.Ok - thanks for pointing out the flaw in a piece of hardware that meets the requirements but still won't work.
But how is one meant to know that?
I'd hardly call usb-c a standard when the specs are all over the place and there's no guarantee that even parts that meet the listed specs will work. usb-c is completely non-standard.
Anyways - thanks again for the info, but this still doesn't address the question of the matter.
Just what in the heck does one need to do to actually power this stupid Pi?
What you're facing isn't a problem with the USB-C "standard". It's the extension of that provided by the Power Delivery (PD) standard. PD specifies a means for the power supply and the powered device to "negotiate" on what will be delivered. Simply USB-C is always 5v and limited to 3A. PD includes that, and then extends it to both higher voltages (which the Pi can't/won't use) and higher current, which is what the Pi5 is built to check for.
All that said, you can make configuration changes to the Pi5 so that it will expect 5A without trying to do a PD negotiation. If that is done, then the Pi5 will *assume* that it'll get the full 5A it wants without waiting for any confirmation from you that it won't get it.
tl;dr You assumption about standards isn't so much wrong, as incomplete.
Statistics: Posted by W. H. Heydt — Tue May 27, 2025 12:25 am