drivers – I can not connect to Bluetooth devices on Ubuntu 16.04 on Dell xps13-9360 with an atheros chipset

I can connect but can not connect to a Bluetooth device on Ubuntu mate 16.04

aulty @ aulty-xps13-9360 ~ $ systemctl status bluetooth.service
● bluetooth.service - Bluetooth service
Loaded: loaded (/etc/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: Active since Wednesday 2019-02-27 22:44:22 PST; 2 minutes ago
Docs: man: bluetoothd (8)
Main PID: 1257 (bluetoothd)
Status: "In progress"
Tasks: 1
Memory: 2.5M
CPU: 30ms
CGroup: /system.slice/bluetooth.service
571257 / usr / lib / bluetooth / bluetoothd -E

February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: Error When Adding Link Loss Service
February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: Not enough free handles to record service
February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: Not enough free handles to record service
February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: Not enough free handles to record service
February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: The current time service could not be registered
February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: gatt-time-server: input / output error (5)
February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: Not enough free handles to record service
February 27 22:44:22 aulty-xps13-9360 bluetoothd[1257]: Not enough free handles to record service
February 27 22:44:29 aulty-xps13-9360 bluetoothd[1257]: Registered end node: sender =: 1.41 path = / MediaEndpoint / A2DPSource
February 27 22:44:29 aulty-xps13-9360 bluetoothd[1257]: Registered end node: sender =: 1.41 path = / MediaEndpoint / A2DPSink

aulty @ aulty-xps13-9360 ~ $ lsusb
Bus 002, Device 001: ID 1d6b: 0003 Root Hub Linux Foundation 3.0
Bus device 001 003: ID 0c45: Microdia 670c
Bus Unit 001 002: ID 0cf3: e300 Atheros Communications, Inc.
Bus Device 001: ID 1d6b: 0002 Root Hub Linux Foundation 2.0