On Sun, 4 Apr 2021, Hans de Goede wrote: > By default 27 MHz Logitech keyboards send the keypresses to the receiver > in plain text. Logitech's Windows "Keyboard and Mouse settings" tool allows > configuring encryption for the keyboard wireless link. > > Now there also is a Linux tool for setting this up: > https://gitlab.freedesktop.org/jwrdegoede/logitech-27mhz-keyboard-encryption-setup > > Once a keyboard is paired in encrypted mode, it will no longer work with > any receiver other then the receiver it was paired with. > If a user accidentally tries to pair another keyboard with the receiver > with which a keyboard has been paired in encrypted mode, then the receiver > looses the encryption key and the originally paired keyboard will no longer > work with either that receiver, or another receiver until the keyboard's > encryption key is rewritten by another encrypted mode pairing using the > tool. Or until it is reset by following a special reset procedure. > > This commit adds 3 new log messages related to 27 MHz keyboard link > encryption to the Logitech dj / hidpp drivers: > > 1. An info level message when keyboard encryption is being used > 2. A warning message when keyboard encryption is not used > 3. An error message when the encryption key has been lost and the > keyboard will not work because of this > > Messages 2. and 3. contain a link to the userspace tool to setup the > encryption. The linked page also contains instructions to clear the key > (without needing the tool) to help a user recover from the keyboard not > working in case 3. > > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Applied, thank you Hans. -- Jiri Kosina SUSE Labs
