Rocky Linux 9.3 - Server Lenovo ST 50 v2 (does not pass the grub without keyboard)

Hi,
i’ve install rocky linux with xfce DE in this computer:
https://www.lenovo.com/it/it/p/servers-storage/servers/towers/thinksystem-st50-v2/len21ts0004

We cannot boot the OS, after start pc, will not boot the operating system without a physically connected keyboard.

The system stops at the grub and does not start the 5-second countdown to boot.

I tried to see in the grub if there was any entry specific to the keyboard, but I can’t find anything.

Can anyone help me ?

I can confirm this is the behavior if using a kvm switch and it is not active for the rocky9 server upon reboot.
I have not found a solution other than flicking the kvm back to active for the rocky server which then continues to boot.

A quick google suggests disabling secure boot that then causes grub to work and boot without the keyboard. At least from a result I found this solved the problem for them. Perhaps not ideal, but if I find anything else, I’ll update here.

Unless there is an option in the BIOS to ignore the lack of keyboard or similar.