reinsert-internal-webcam

#!/bin/bash

# PRODUCTNAME=`sudo dmidecode -t baseboard | grep "Product Name" | cut -f2 -d':'`

# I want to be sure that you do not run this on your machine without finding out usb bus id and port id. See readme first.
# So I will do this check first
# if [[ "$PRODUCTNAME" == " Flex 3-1570" ]]; then

	# 04f2:b50f Chicony Electronics Co., Ltd - my lenovo flex 3 internal webcam
	# 5986:02d2 Acer, Inc  - my lenovo e530 internal webcam
	VID=5986 # change to yours
	PID=02d2 # change to yours

	# Check if such device is presented now
	if [[ ! $(lsusb -d $VID:$PID | grep "$VID:$PID") ]]; then
		echo $VID:$PID usb device is not presented now. Are you sure you set VID and PID correctly?
	else # Now we know that such usb device is presented currently
		# Bus id may change after reboot, so we get it dynamically
		BUS=`lsusb -d $VID:$PID | cut -f2 -d' ' | tr -d '0'`
# 		echo bus=$BUS
		PORT_IN_STRING=`lsusb -t | grep -m1 "Class=Video, Driver=uvcvideo," | cut -f1 -d':'` # here we got string like "    |__ Port X"
# 		echo PORT_IN_STRING="$PORT_IN_STRING"
		SPACES_BEFORE_PORT=`expr $(echo "$PORT_IN_STRING" | wc -m) - 11` # minus count symbols for "|__ Port X" substring
# 		echo SPACES_BEFORE_PORT = $SPACES_BEFORE_PORT
		if [[ $SPACES_BEFORE_PORT == 4 ]]; then
			PORT=`echo $PORT_IN_STRING | tr -d "|__ Port "`
		elif [[ $SPACES_BEFORE_PORT == 8 ]]; then
			PORT_MAJOR=`lsusb -t | grep -A1 "/:  Bus 0$BUS" | tail -n1 | cut -f1 -d':' | tr -d "|__ Port "`
			PORT_MINOR=`echo $PORT_IN_STRING | tr -d "|__ Port "`
			PORT=$PORT_MAJOR.$PORT_MINOR
		fi
# 		echo port=$PORT
		if [[ `cat /sys/bus/usb/devices/"$BUS"-"$PORT"/idVendor` == $VID &&
			`cat /sys/bus/usb/devices/"$BUS"-"$PORT"/idProduct` == $PID ]]; then
			sudo sh -c "echo '0' > /sys/bus/usb/devices/"$BUS"-"$PORT"/bConfigurationValue"
			sudo sh -c "echo '1' > /sys/bus/usb/devices/"$BUS"-"$PORT"/bConfigurationValue"
		fi
	fi
# fi