Logitech has a Unifying receiver that you can add several devices using the same USB device. Is this supported in Ubuntu and if so do I have to additionally configure something so that when adding a new wireless device it gets recognized by the same receiver.
Info: http://www.logitech.com/en-us/66/6079
I've a Logitech Illuminated Keyboard and M525 mouse here, both are using the Logitech Unifying USB receiver. They works out-of-the box, Plug & Play!
lsusb | grep Logitech:
Bus 002 Device 004: ID 046d:c52b Logitech, Inc. Unifying Receiver
dmesg | grep Logitech:
input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.0/input/input2
generic-usb 0003:046D:C52B.0001: input,hidraw0: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:00:1d.0-1.2/input0
input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2:1.1/input/input3
generic-usb 0003:046D:C52B.0002: input,hiddev0,hidraw1: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:00:1d.0-1.2/input1
generic-usb 0003:046D:C52B.0003: hiddev0,hidraw2: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:1d.0-1.2/input2
Having that said, Logitech only supports Unifying software for Windows and Mac OS X. For Linux, I have created the ltunify tool which is described in detail on my article Logitech Unifying for Linux: Reverse Engineering and unpairing tool. Quick installation instructions if you are in a hurry:
sudo apt-get install git gcc
git clone https://git.lekensteyn.nl/ltunify.git
cd ltunify
make install-home
This will fetch the sources and install the program to $HOME/bin/ltunify, if $HOME/bin did not exist before, then you may have to re-login or reopen your terminal. After doing so, you can pair a new device with the sudo ltunify pair command and unpair devices with a command like sudo ltunify unpair mouse (be sure to have a second device that you can use after detaching your Unifying device!).
A graphical tool is also available, Solaar. It has better support for functionality of newer devices such as swapping the functionality of FN keys. It is available though the ppa:daniel.pavel/solaar PPA (if you do not know how to install such a "PPA", see What are PPAs and how do I use them?). After installation, you can search for Solaar in the applications menu and start it from there.
