# bluetoothctl scan on
Failed to start discovery: org.bluez.Error.InProgress
问题背景：
blueZ版本：
# bluetoothd --version 5.52
kernel版本：4.4.13
Bluetooth chipset: RTL8761B(vpid 0bda:8771)
问题描述：
执行scan时报“Failed to start discovery: org.bluez.Error.InProgress”的错误。
解决办法：
修改/etc/bluetooth/main.conf； 把DebugKeys的值改为false。
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