Unable to plug portenta into raspberry pi with usb a to c cable

Official Hardware Portenta Family Portenta H7
1

I have tried both 64 bit raspberry pi 4 and 32 bit raspberry pi 2b and 2 different usb cables (amazon p/n B09FYVD6B5). Both with os < 1 year old. When I plug it into pi2b it does now power up the portenta so I connected the VIN from the portenta breakout board to +5v. The led flashes green after a double reset.

In all cases I get the error "Cannot enable, Maybe usb cable is bad?" on dmesg on the pi.

I can plug same cable into my windows 11 pc and the portenta enumerates as com10 with hardware id "USB\VID_2341&PID_035B&REV_0200&MI_01"

Has anyone gotten the portenta h7 lite to plug into a raspberry pi?

2

see also bug report: unable to connect an arduino portenta lite via usb to raspberry pi · Issue #6192 · raspberrypi/linux (github.com)

I got it to work if I added a 4 port usb hub. Not ideal but obviously a software os issue.

3

The developers for raspberry pi os believe there is something wrong with the bootloader usb negotiation code. Even though it connects to pc, and connects to pi if there is a usb hub in the middle. Would it help if I sent you a raspberry pi and cable for you to test?

4

What do I need to do to get this fixed? Having to add a usb hub to make it work seems klunky

5

This problem was solved by supplying 5.1v at 2 amps to raspberry pi. This issue is now closed

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