On 21/06/2025 à 17:29, Roland Clobus wrote:
I looked at the libvirt configuration. In the <os> tag, there is no sub tag for <loader> or <nvram>, which suggests that the VM is booted via BIOS instead of UEFI.
I don't think so because the OP's KVM configuration has <os firmware="efi"> and d-i partman would not allow to create an ESP when booted in BIOS mode.
I tested trixie GRUB + JFS in bookworm virt-manager (QEMU/KVM): - BIOS: ok - EFI with secure boot off: ok - EFI with secure boot on: ko
