Feature Request: Toggle NKRO On/Off

[XuhengLi]

Hi,

I wonder if it's possible to support the dynamic toggling of NKRO.

This is an important feature for multi-language macOS users because macOS has problems handling CAPS when NKRO is enabled.

More specifically, macOS has a feature that supports switching the input method from and to U.S. by a short press of CAPS, and a long press of CAPS will lock all input to uppercase. But when NKRO is enabled, a short press of CAPS will be interpreted(by macOS) as both a short and long press, and thus macOS will switch the input method and then lock the caps.

More discussion can be found in an issue in the upstream qmk_firmware repo: qmk/qmk_firmware#15178.

I build the firmware on my own to disable NKRO in keyboards/system76/launch_1/rules.mk, but this will also disable system76_ec_eeprom_op in keyboards/system76/system76_ec.c because eeprom_update_block/eeprom_read_block is only defined when ENABLE_NKRO = yes. Disabling system76_ec_eeprom_op will make the configurator unable to save the LED configuration(but the keymap is fine).

Based on the qmk_firmware wiki, NKRO should be able to be disabled dynamically: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work. But the Magic N command doesn't seem to work on the launch firmware.

If it is possible to support this feature?

Cheers!