@Bastian Looking into this, I can’t believe its still an issue after all of these years (> 5). The only solution I can find is to switch the disk controller to ahci mode from RST. If you have a live system that was installed with RST on windows will hate you. I’ve found instructions on how to fix windows.

The ideal solution would be for you to recreate you golden image and sysprep it on a system with the disk in ahci mode enabled. That way everything will work moving forward.

ok thank i actually install newer version of ubuntu not 20.04 but 19.10 cause i already have this iso,

i install again and i change the dhcp conf with filename “ipxe.efi” and i give you new later.