Hello,
I have this weird problem where my kmac 2 doesn't work in grub.
It works at bios time, it works at os time. But not in Grub
I tried enabling the support for usb legacy, but only page up and page down work (not the arrows).
I still can chose which OS I boot into (linux is the first one on the list and windows the last one, so pgup pgdn get me to those) but I find it weird.
I read somewhere than getting a usb to ps2 adapter works too. Not sure why tho.
Did anyone experienced the same problem and behaviour ?