Sembra che sia in arrivo una nuova rev. hardware di RPi4 per sistemare un problema alla USB-C (attualmente fuori standard) che non permette l'alimentazione della scheda con cavi ed alimentatori USB-C qualsiasi:
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The problem is that the Raspberry Pi 4’s charging port shares a single resistor between two of its pins, which the official USB-C spec says should have one resistor each. This causes problems for so-called “e-marked” cables such as those supplied with MacBooks and other laptops fitted with USB-C Thunderbolt charging ports. These cables contain chips designed to manage features like power draw and to detect different kinds of accessories. If you try to power a Raspberry Pi 4 using one of these cables, it will detect the microcomputer as an “Audio Adaptor Accessory” and won’t power it.
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quindi:
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A spokesperson for the Raspberry Pi Foundation has since confirmed to Ars Technica that a new board revision should arrive in the coming months.
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https://www.theverge.com/2019/7/10/2...ssory-charging