Comment 23 for bug 1510570

Bluez 5.40 works for me for both Designer keyboard and mouse. At this time Ubuntu has not packaged it up into a DEB but I was able to build and install it myself (search for bluez 5.40 to find how to download the entire large source). I am using Ubuntu 16.04 but a newer kernel made by Ubuntu (4.6.0-040600-generic). It is also important to install the patches Guilhem mentions in #22.

I needed some additional packages to do the build. This is the whole procedure as well as a website that helped me figure this out:

 ./configure --prefix=/usr --mandir=/usr/share/man --sysconfdir=/etc --localstatedir=/var
 sudo apt-get install glib2.0
 sudo apt-get install libdbus-1-dev
 sudo apt-get install libudev-dev
 sudo apt-get install libical-dev
 sudo apt-get install libreadline-dev
 sudo make
 sudo make install

(I got help from http://rrbluetoothx.blogspot.com/2016/04/rr-bluetooth-compile-bluez-539.html).

They haven't got everything right yet: both devices, though they work fine, are of unknown type, and syslog is still littered with python failures whenever one of these connects or disconnects.