Subj : Re: pi5 psu?
To   : All
From : Chris Townley
Date : Thu Oct 09 2025 19:44:07

On 09/10/2025 19:01, Joerg Walther wrote:
> Mike Scott wrote:
> 
>>> The psu is not one expressly declared for use with the Pi5, or is it?
>>> Afaik the Pi5 needs 5A plus the USB Power Delivery feature, which the
>>> Pi4 psu does not have. The Pi4 psu won't let you run the Pi5 reliably.
>>> So you probably need another psu after all, I'd recommend the official
>>> one, you can never go wrong with that.
>>
>> But it is the official one. Or at least, was bought as such and is so
>> labelled. A huge wall-wart.
>>
>> Bought from pi hut back in February; carries authentic-looking labelling.
> 
> There is an official one guaranteed to work with the Pi4 only and a
> different official one for the Pi5, and only this one has the PD
> feature. Check what exactly you have bought. If this really is the Pi5
> version, it is defective and you should consider returning it.
> 
> -jw-

Are you using something like the Argon ONE V3 case?
That needs the config.txt line "usb_max_current_enable=1" as it filters 
the power through its hardware. Bloody pain!

-- 
Chris

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