Ubuntu – enabling USB wakeup

First, you need a command to set “enabled” to the USB ports.

Quick hack of shell script. Let’s call this /usr/local/bin/usb-standby-power-on.sh.

#!/bin/bash

for usbport in /sys/bus/usb/devices/usb*/power/wakeup ; do
    echo enabled > $usbport
done
exit 0

Then, you need a systemd unit file. Name this /etc/systemd/system/usb-wakeup-enable.service.

[Unit]
Description=Enable USB's stand-by power

[Service]
Type=oneshot
ExecStart=/usr/local/bin/usb-stanby-power-on.sh
User=root
Group=root
RemainAfterExit=true  # Indicates that the service remains active after the main process exits

[Install]
WantedBy=basic.target

Then,

sudo systemctl daemon-reload 
sudo systemctl enable usb-wakeup-enable.service
sudo systemctl start usb-wakeup-enable.service