In 2003, I was presented with a lovely Logitech optical mouse (an MX500). It had a wheel (not an ubiquitous feature then), no fewer than eight buttons, and an excellent 800 cpi resolution. Unfortunately, Linux would see it as a 400 cpi device, and two of the buttons would echo the wheel motion. A bit of quick research on the web uncovered the sage advice ‘you can't do anything about the extra buttons, live with it’. It also uncovered a list of vendor-specific USB control commands for Logitech mice (proving yet again that the majority of Linux users are no longer producers but ― at best ― consumers).