I tried to install OPNsense-17.1.4-OpenSSL-vga-amd64.img in UEFI Modus. When I change the keymap from default to another language (german in my case) the system freezes after accepting the changes. Only Ctrl+Alt+Del for reboot is working. With the default keymap everything is fine.
This is during running the installer?
Yes. It happens during installation while the installer is running. Testet on two different mainboards. But only in UEFI mode. An installation with the same USB Stick in normal VGA mode (not UEFI) works fine without system freezing.
There is a "similar" issue below, where UEFI doesn't seem to work as expected with regards to keymap settings. Will have to try in a VMware setting, I don't have another test setup.
https://forum.opnsense.org/index.php?topic=5019.0
Cheers,
Franco