I am using Linux Mint 18.2 Sonja and want to connect my new Logitech MX Master S2 mouse without using the bluetooth-dongle, but directly with the inbuilt bluetooth module of my notebook. This works so far with my PC after running the commands:

~$ sudo hciconfig hci0 sspmode 1
~$ sudo hciconfig hci0 down
~$ sudo hciconfig hci0 up

However by entering sudo hciconfig hci0 sspmode 1 I get the following error message on my notebook:

Can't set Simple Pairing mode on hci0: Input/output error (5)

After reading a few articles in different communities they recommended to do the following:

alpha@Pavilion ~ $ bluetoothctl 
[NEW] Controller B0:35:9F:0E:4F:3D Pavilion [default]
[NEW] Device C5:E2:3F:77:5C:3D MX Master 2S
[NEW] Device DD:6A:F3:5A:A2:A2 MI Band 2
[NEW] Device C5:E2:3F:77:5C:3B MX Master 2S
[NEW] Device 00:02:3C:51:C6:12 Creative T50 Wireless
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# agent on
Agent registered
[bluetooth]# default-agent 
Default agent request successful
[bluetooth]# scan on
Discovery started
[CHG] Device C5:E2:3F:77:5C:3D RSSI: -15
[bluetooth]# scan off
Discovery stopped
[CHG] Device C5:E2:3F:77:5C:3D RSSI: -4
[bluetooth]# trust C5:E2:3F:77:5C:3D
Changing C5:E2:3F:77:5C:3D trust succeeded
[bluetooth]# pair C5:E2:3F:77:5C:3D
Attempting to pair with C5:E2:3F:77:5C:3D
[CHG] Device C5:E2:3F:77:5C:3D Connected: yes
Failed to pair: org.bluez.Error.AuthenticationTimeout
[CHG] Device C5:E2:3F:77:5C:3D Connected: no
[bluetooth]# connect C5:E2:3F:77:5C:3D
Attempting to connect to C5:E2:3F:77:5C:3D
Failed to connect: org.bluez.Error.Failed
[bluetooth]# version
Version 5.37
[bluetooth]# exit
Agent unregistered
[DEL] Controller B0:35:9F:0E:4F:3D Pavilion [default]
alpha@Pavilion ~ $ 

As you can see, by trying to pair the mouse it is shortly connected and followed by the error: Failed to pair: org.bluez.Error.AuthenticationTimeout
Has someone an idea?

Thanks in advance!


At least I found a way to solve the problem:
I installed the Bluetooth Manager called blueman:

~$ sudo apt install blueman

In the GUI there is a button which looks like a calculator or so, called "Create pairing with the device" when you hover over it. While by right-click neither the buttons "pair" nor "Setup / pair device" work, the mentioned button above did the job!

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