9.97.1 on new RPi4B won't see USB keyboard

  • I've been running LibreELEC-RPi4.arm-9.97.1.img.gz on an early RPi4 (2GB Board b03111) all fine with a USB attached keyboard.

    I just bought a new RPi4 (2GB Board b03114) and just swapped the SD card into the new box - but the USB attached keyboard (and wifi) won't work.

    I booted up Raspberry Pi OS and the keybaord and wifi both work fine.

    I updated the bootloader and firmware whilst in Raspberry Pi OS to the lastest.

    Tried to boot again into 9.97.1 and the USB keyboard still doesn't work.

    Dropping back to a 9.2.6 Libreelec the USB keyboard works fine.

    I also tried a brand-new install of 9.97.1 and it wouldn't recognise the keyboard at the first screen.

    What may I be missing in Libreelec 9.97.1 that's stopping the USB keyboard connecting?

    (I haven't got easy ethernet access for the RPi yet to try ssh)

    Thanks.