I come from Fedora 22 and 23, because it had support for my BLE mouse (Microsoft Designer Mouse). I decided to switch to the "stable" 16.04 because I like Unity more than gnome. To make my mouse at least pair with my PC, I had to remove 50-bluetooth-hci-auto-poweron.rules from and uncommented autoenable=true from /etc/bluetooth/main.conf (as indicated here https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1510570).
Sometimes when I boot up the computer, the mouse works (although it stops working after a while), and sometimes don't. For example, today I restarted my pc 10 times without success. Yesterday, it worked after 3 reboots. Please help me, this is really getting annoying.
Atheros Communications, Inc. AR3012 Bluetooth 4.0
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: BNEP socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
Bluetooth: hci0 command 0x0c52 tx timeout
[bluetooth]# info CC:E4:52:E7:9B:9E
Name: Designer Mouse
Alias: Designer Mouse
[bluetooth]# connect CC:E4:52:E7:9B:9E
Attempting to connect to CC:E4:52:E7:9B:9E
Failed to connect: org.bluez.Error.Failed
It would be great if there were a way to know what differs from the fedora configuration, because on that system it worked just perfectly.