Review of Linux Compatibility
The Logitech M525 is automatically supported under Linux (e.g., under Ubuntu 12.04) and uses the Logitech Uniying Receiver for its wireless connection.
It is recommended to use the program Solaar if several Logitech wireless devices are used in parallel with one Logitech Unifying Receiver. The program allows to manage several connected Logitech devices and also shows the charge level. The program can be added to the Ubuntu package managemet and gets installed by:
sudo add-apt-repository ppa:daniel.pavel/solaar sudo apt-get update sudo apt-get install solaar