Published: Wed, July 10, 2019
IT | By Lester Massey

Raspberry Pi 4 does no longer work with some USB-C chargers

Raspberry Pi 4 does no longer work with some USB-C chargers

Many users also complained that the Pi 4 is not working with all USB-C cables.

E-marking is a technique which gives a cable a digital signature based on what the cable is going to do. Since the Pi 4 USB-C port is wired incorrectly, these smart cables will detect the Pi 4 as an "Audio Adaptor Accessory" and refuse to charge them.

The bad news is that there's not a lot the team can do about this until the next hardware revision - the quirk is built into the hardware. Fortunately, Upton says they expect the issue to be fixed in a future board revision. "It's surprising this didn't show up in our (quite extensive) field testing program". One of the most significant moves is the switch to USB-C for power, but it turns out that this port has a rather interesting issue. But buyers only needed a few weeks to discover their brand new mini-computers pack a serious USB-C issue that could render them useless, at least until you figure out what's wrong.

In order for a USB-C connection to work as intended with all USB-C cables, the Type-C connector needs to use two independent CC resistors.

Benson Leung, a Google Chrome OS engineer, has always been fighting for a stricter and more uniform testing and approval standard for USB Type C cables and chargers.

The Raspberry Pi Foundation has openly acknowledged that the recently released Raspberry Pi 4 won't work when powered using certain USB Type C cables.

The USB-C specification defines two pins called CC1 and CC2 for connecting to the power sink in a specific way. "The Raspberry Pi 4 is actually a pretty awesome little machine", said Offensive Security.

The developers behind Kali Linux agree and have made it so that their distribution is compatible with Raspberry Pi 4 and has "on-board wifi monitor mode & frame injection support".

These e-marked cables have chips that verify the cable's characteristics. Raspberry Pi 4 owners will need to use non-e-marked USB-C cables. However, several modern-day chargers are able to deliver far more power owing to newer Fast Charging standards.

Fortuitously, it doesn't damage the Raspberry Pi 4, and it doesn't create any fire hazard.

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