Knoppix 8.6: UEFI - redirect to ttyS0

Hello,

I installed knoppix 8.6 on a USB stick.

I modified /etc/inittab to redirect the console to ttyS0.
It works.

But when I booted with the same device but chose UEFI in the BIOS boot menu, the redirection does not work.

Can you please explain why ?

I need UEFI boot because I have to install grub 2.x on another stick.

Thank you in advance,
Zvika