Unreal tournament 2004 buy. Find many great new & used options and get the best deals for Logitech K810 / K811 Bluetooth Keyboard - REPLACEMENT Keys Clips Parts.ca at the best online prices at eBay! Amazon s3 ftp. The biggest problem is that the up-event for a key occasionally gets lost and then some key will auto-repeat until you press it again. Or even worse, it's a key that has no visible effect like an Alt key, and then you have to figure out which key it is that is in the virtual down position, and press it again. Logitech K810/K811 Keyboard F-keys switcher for Linux (Ubuntu) Usage. Sudo k81x-fkeys -d devicepath -v on off 'On' enables the regular functions of F1-F13 keys and special functions (like volume or brightness) are accessible after pressing the Fn key.