Hey,
Some context around that. Before recent commits, when we were producing qcow2 or raw images, those were MBR images with an EFI partition. If the grub-bootloader was used, then Grub was installed both in the post-MBR gap and in the EFI partition. This means that a single image could be booted with or without the qemu -bios option, i.e both in BIOS legacy or in EFI mode. Commit d57cab764122af69d52d8cc9c843456044e5d7bc changed the default behaviour and the produced images were by default MBR images, without EFI partitions. I changed that with e5ed1712da049b1c3dcf01e0a7e02e48a8aff012 and dfaeaae9c7e7283b99ad10aef3e61402e9820bc7 which introduced a new image type called mbr-hybrid-raw, which is now the default image type, restoring the previous behaviour. Now it looks to me that what Ricardo is observing is not linked to any of the changes mentioned above. When using the grub-efi-bootloader, Grub is never installed in the post-MBR gap. This was already the case in 1.4.0 and is still true. Those images cannot be booted without the qemu -bios option unless I'm mistaken. Hope it helps, Mathieu