Linux 7.3 Kernel Adds Native Logitech HID++ 2.0 Button Remapping Support

The Linux 7.3 kernel now natively supports Logitech HID++ 2.0 button reprogramming. This feature allows system software to query, remap, and intercept mouse buttons and special keyboard keys. When a button is intercepted, the system uses a specific notification mechanism instead of the traditional standard key event. Previously, such functionality relied mainly on user-space open-source software; with the introduction of support in the mainline driver logitech-hidpp, the feature now has native kernel-level backing.

Some Logitech mice that support the HID++ 2.0 protocol can report intercepted reprogrammed control signals via the 0x1b04 feature report. This update adds a quirk-based event handling path; the handler can temporarily intercept validated device buttons, parse divertedButtonsEvent into a list of currently pressed controls, and report the corresponding key state for each mapped control to the evdev driver. The control mapping is stored in an array independent of specific products, ensuring that adding support for new mice in the future does not change the evdev event capabilities declared by supported devices. The patch has entered the "for-next" Git branch of the Linux kernel HID subsystem.