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Unfortunately, system76 developers added exactly that functionality to their firmware: https://github.com/system76/qmk_firmware/commit/a1ab70c3a28a...

So it is possible to reboot into the firmware update mode just by sending some bytes to the raw HID interface. Apparently they did not think about the security aspect of this feature.

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Would you mind creating a GitHub issue to track this on? We may decide to change the behavior before production

EDIT: I have created an issue here: https://github.com/system76/launch/issues/17

We do not intend for the production firmware to include any software reset to bootloader functionality. It will require a physical keypress (Fn+ESC)

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