Turn on USB Power

balenaFin
#1

Hi,

I have followed this Disable USB for security reasons to be able to turn off the USB ports on the Balenafin but when I come to turn them back on again nothing happens.

sudo uhubctl -a on -l 1
Current status for hub 1 [1d6b:0002 Linux 4.19.66-v7+ dwc_otg_hcd DWC OTG Controller 3f980000.usb, USB 2.00, 1 ports, ppps]
Port 1: 0000 off
Sent power on request
New status for hub 1 [1d6b:0002 Linux 4.19.66-v7+ dwc_otg_hcd DWC OTG Controller 3f980000.usb, USB 2.00, 1 ports, ppps]
Port 1: 0000 off

I see the power on request is sent, but nothing happens.
I have to reboot to get the USB hub working again.

Any ideas?

Cheers,

Rick.

#6

Hi

Can you tell us a bit about how you are using uhubctl? Is it from privileged container?

1 Like
#17

Hey there,

Thanks for reporting this. If you followed the above instructions in the forum ticket you linked, there was a missing instruction in the Dockerfile- we should enable UDEV and the forum post has been updated accordingly. So, can you please modify your Dockerfile to:

FROM balenalib/raspberrypi3-debian-python:3.8.2
ENV UDEV=on
WORKDIR /usr/src/app
RUN install_packages uhubctl
COPY *.sh ./
CMD ["./start.sh"]

Note the ENV UDEV=on directive.

Hope this helps. Let us know.
Regards
Rahul

#19

I cloned the uhubctl repo, compiled it and then ran the command as sudo. So iā€™m not using docker.

#21

Are you using balenaOS or RaspberryPi OS please?

#23

Ok, just noticed on your other post you are using Raspbian

Let me confirm with my colleagues and get back to you

#31

I have found a solution to this.

echo 1 | sudo tee /sys/devices/platform/soc/3f980000.usb/buspower >/dev/null
echo 0 | sudo tee /sys/devices/platform/soc/3f980000.usb/buspower >/dev/null

Turns the power on and off as needed

Cheers,

Rick.

#32

Thank you for reporting!