From 9c1a5511c68e95557e29eaa2e1136863d9ee5c47 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrgen=20Weigert?= <jw@owncloud.com>
Date: Sat, 25 May 2019 08:54:07 +0200
Subject: [PATCH] idea how to switch off usb power. does not work for me. The
 plan was to make the badge display its text by switching off power.

---
 usb-power.sh | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 usb-power.sh

diff --git a/usb-power.sh b/usb-power.sh
new file mode 100644
index 0000000..1a9000f
--- /dev/null
+++ b/usb-power.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+###############################################################
+# It will power on/off a usb device based on a string found in dmesg output.
+# 
+# Example for the led-badge:
+#
+# usb-power.sh off "Product: LS32 Custm HID"
+# - This code does not work with a Lenovo-T440s running Mint. Not sure why.
+###############################################################
+if [[ $2 == "" ]]; then
+	echo "Usage: $0 [on|off] DMESG_STRING"
+	exit;
+fi
+USB_DEV=$(dmesg | grep -o "usb .*: $2" | tail -n 1 | awk '{print $2}' | sed 's/://')
+if [[ $USB_DEV == "" ]]; then
+	echo "Device not found";
+	exit;
+fi
+
+echo using USB_DEV=$USB_DEV
+
+if [[ $1 == "on" ]]; then
+	echo "2000" > /sys/bus/usb/devices/$USB_DEV/power/autosuspend_delay_ms 
+	echo "on" > /sys/bus/usb/devices/$USB_DEV/power/control 
+elif [[ $1 == "off" ]]; then
+	echo "0" > /sys/bus/usb/devices/$USB_DEV/power/autosuspend_delay_ms 
+	echo "auto" > /sys/bus/usb/devices/$USB_DEV/power/control 
+else
+	echo "Unknown action: $1"
+	exit;
+fi