I have a Dell Inspiron 15R running Ubuntu 12.04 LTS 64-bit, and a Logitech M705 wireless mouse. The laptop has 3 USB ports; left, right, and back. When the mouse dongle is plugged in to the back or left UBS port on startup it works fine. When plugged into the right it doesn't.
If I start up with the dongle disconnected and try to plug it in to any port, it works on all except the right one.
Once the mouse is working on the left or back, if I disconnect the dongle and place it in the right USB port, the right one works! However, if I reboot it stops working again until I repeat the process.