Booting Tumbleweed from USB on Raspberry Pi 4B

I booted and setup from microSD and followed https://en.opensuse.org/HCL:Raspberry_Pi4.

Next I also installed openSUSE-Tumbleweed-ARM-KDE-raspberrypi.aarch64-2021.08.06-Snapshot20210818.raw.xz to a USB HD.

I read the Wiki and ran "rpi-eeprom-update -a -d"

When I reboot it stops at the grub prompt when booted with the microSD in.

grub> ls

(proc) (hd0)  (hd0,msdos3)  (hd0,msdos2)  (hd0,msdos1) (hd1,msdos3)  (hd1,msdos2) (hd1,msdos1)

Booting with onlu the USB HD, in a loop looking for the hard drive.

No problem when booting with just a Ubuntu USB hard drive with no microSD card in. Ubuntu setup is quite straightforward.

Anyone succeeded with Tumbleweed?

Regards

Sid.