Debian GNU/HURD netinst.iso -> boots in "text mode" or "expert mode" but no keyboard

I have downloaded the "netinst.iso" from

https://cdimage.debian.org/cdimage/ports/latest/hurd-amd64/

I have created a USB key (dd if=netinst.iso of=/dev/sdb ...)

I can boot the PC from the USB key, and GNU GRUB menu appears. But....

- If I select "Text install" or "Expert install", I get a nice text menu
but the keyboard does not work

- If I select either of the graphical modes the boot process hangs after a
few messages

I am using a no-name USB keyboard. Do I need to get an old-fashioned PS/2
keyboard? Please note: the keyboard works in the GNU GRUB menu but does not
work in "text install (Mach console)" nor "Expert install"

Cheers,
Shinichi