Issues with GRUB2 as a bootloader using GPT

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https://bbs.archlinux.org – According to this section of the GRUB2 wiki-article, it seems I don't need the 2 MiB partition in the beginning when using UEFI + BIOS. However I've tried this and didn't really change anything, same error message ("BootDevice not found").This partition is also not required if the system is UEFI based, as no embedding of bootsectors takes place in that case. Syslinux does not require this partition.Edit:I'm also wondering which flags my seperate /boot -partition should have. I've tried both without any, "boot" and "bios_grub" without luck, (HowTos)