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32 lines
985 B
32 lines
985 B
6 years ago
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#!/bin/bash
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###############################################################
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# It will power on/off a usb device based on a string found in dmesg output.
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#
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# Example for the led-badge:
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#
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# usb-power.sh off "Product: LS32 Custm HID"
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# - This code does not work with a Lenovo-T440s running Mint. Not sure why.
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###############################################################
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if [[ $2 == "" ]]; then
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echo "Usage: $0 [on|off] DMESG_STRING"
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exit;
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fi
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USB_DEV=$(dmesg | grep -o "usb .*: $2" | tail -n 1 | awk '{print $2}' | sed 's/://')
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if [[ $USB_DEV == "" ]]; then
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echo "Device not found";
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exit;
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fi
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echo using USB_DEV=$USB_DEV
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if [[ $1 == "on" ]]; then
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echo "2000" > /sys/bus/usb/devices/$USB_DEV/power/autosuspend_delay_ms
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echo "on" > /sys/bus/usb/devices/$USB_DEV/power/control
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elif [[ $1 == "off" ]]; then
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echo "0" > /sys/bus/usb/devices/$USB_DEV/power/autosuspend_delay_ms
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echo "auto" > /sys/bus/usb/devices/$USB_DEV/power/control
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else
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echo "Unknown action: $1"
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exit;
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fi
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