If you try to select options on extlinux or grub on boot normal keyboards can select options but those with qmk firmware (or at least mine) are not recognice until the OS is initialize
u-boot does not support QMK keyboards.
If you try to select options on extlinux or grub on boot normal keyboards can select options but those with qmk firmware (or at least mine) are not recognice until the OS is initialize
u-boot does not support QMK keyboards.