Am 16.09.21 um 23:34 schrieb Ulf Zibis:
I now additionally have installed Ubuntu-64 16.04.1 without connection to the internet, to prevent from installing a newer GRUB version than from the install ISO medium. So now I have grub-efi-and64 in version 2.02~beta2-36ubuntu3.1 to boot with. With this version I'm able to boot Ubuntu-32 18.04.1 and Ubuntu-32 16.04.7 with a very recent kernel. So I still suspect, that the reason for my problem is the kernel version.
Hi again, Ubuntu says, it is a feature to block 32-Bit operating systems with 64-bit GRUB. See: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1889556 So please answer my question: Is this also the case in the newer bare GNU-GRUB versions? -Ulf
