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My BT keyboard doesn't pair. Can you help me out?

Just bought this very nice bluetooth desktop set and this Asus laptop and installed Ubuntu 15.04 on it.

First my mouse didn't pair. I fixed that by installing Bluez5 and Bluetooth Manager, as kindly suggested by Eric Power here: Bluetooth mouse pairs but does not connect

Now the keyboard doesn't pair.

On the keyboard I press a small button for 3 secs to put it in pairing mode. Bluetooth Manager sees the keyboard. I click "setup". BT Manager says to enter a code on the keyboard. I enter that code on the keyboard and press ENTER: boom, the BT Manager says immediately "Failed to add device".

The final lines of /var/log/syslog are as below. Thank you for your help!

last lines of /var/log/syslog:
bluetoothd[1144]: Error reading PNP_ID value: Attribute requires authentication before read/write
bluetoothd[1144]: Unable to register GATT service with handle 0x0011 for device FF:DE:BC:04:E4:E9:
org.blueman.Applet[1357]: ERROR:dbus.connection:Exception in handler for D-Bus signal:
org.blueman.Applet[1357]: Traceback (most recent call last):
org.blueman.Applet[1357]: File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 230, in maybe_handle_message
org.blueman.Applet[1357]: self._handler(*args, **kwargs)
org.blueman.Applet[1357]: File "/usr/lib/python2.7/dist-packages/blueman/bluez/PropertiesBlueZInterface.py", line 51, in wrapper
org.blueman.Applet[1357]: handler(name, value, **kwargs)
org.blueman.Applet[1357]: File "/usr/lib/python2.7/dist-packages/blueman/plugins/applet/SerialManager.py", line 48, in on_device_property_changed
org.blueman.Applet[1357]: d = Device(path)
org.blueman.Applet[1357]: File "/usr/lib/python2.7/dist-packages/blueman/main/Device.py", line 39, in __init__
org.blueman.Applet[1357]: self.Properties = self.Device.get_properties()
org.blueman.Applet[1357]: File "/usr/lib/python2.7/dist-packages/blueman/bluez/errors.py", line 143, in warp
org.blueman.Applet[1357]: raise parse_dbus_error(exception)
org.blueman.Applet[1357]: DBusException: org.freedesktop.DBus.Error.UnknownObject: Method "GetAll" with signature "s" on interface "org.freedesktop.DBus.Properties" doesn't exist
bluetoothd[1144]: Unable to register GATT service with handle 0x0011 for device FF:DE:BC:05:E4:E9:
bluetoothd[1144]: Error reading PNP_ID value: Attribute requires authentication before read/write
bluetoothd[1144]: Error reading PNP_ID value: Attribute requires authentication before read/write
bluetoothd[1144]: Unable to register GATT service with handle 0x0011 for device FF:DE:BC:05:E4:E9:
bluetoothd[1144]: Report Map read failed: Attribute requires authentication before read/write
bluetoothd[1144]: Protocol Mode characteristic read failed: Attribute requires authentication before read/write
bluetoothd[1144]: HID Information read failed: Attribute requires authentication before read/write
bluetoothd[1144]: Read Report Reference descriptor failed: Attribute requires authentication before read/write
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This issue is due to the issue of gattool. The bluetoothd calls gattool to get attributes from the blue-tooth low energy device. Probably the device's firmware doesn't support the authentication protocol.

I avoid this issue by enabling the bluetooth experiment feature. add the "-E" options in your /etc/init.d/bluetooth, NOPLUGIN_OPTION="-E". Then, restart the bluetooth service.

| improve this answer | |
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It worked for me by updating bluez:

apt-add-repository ppa:vidplace7/bluez5
apt-add-repository ppa:blueman/ppa
apt-get update
apt-get install bluez
apt-get install blueman
apt-get install bluez-compat

Then I had to start bluez in experimental mode: Replace /usr/sbin/bluetooth by your own script:

#!/bin/sh
bluetooth -E

Now I can connect with the blueman-applet mouse and keyboard.

Any ideas how to connect automatically on startup or without using blueman (just command line)?

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For me, after attempting to pair the keyboard in Bluetooth Manager, I noticed a little notification bubble with a passcode. The bubble is there for only a couple of seconds. I typed the passcode on the keyboard and pressed Enter, and then the keyboard paired.

It took a couple of tries to get it to work (putting the keyboard back into pairing mode).

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