Mark Fletcher, You can do EFI installation[1] (grub-efi will recognize others partitions of GPT table), just switch off Secure Boot and reboot, use any DVD/usb linux .iso with EFI (for example: Debian 8.x) and before start installation check if is boot with EFI or legacy (enter with text mode and type [ -d /sys/firmware/efi ] && echo "EFI boot on HDD" || echo "Legacy boot on HDD") the output will display the installation mode. The output need be *EFI boot on HDD , *after installation grub-efi will find automatically others partitions of GPT table If output show *Legacy boot..* you followed wrong the steps. [1] https://wiki.debian.org/GrubEFIReinstall
2016-05-04 8:34 GMT-04:00 Stefan Monnier <monn...@iro.umontreal.ca>: > > How can I set up a machine to boot in UEFI mode when the running kernel > was > > booted in legacy mode? > > AFAIK it goes something like this: > - Use a GPT partition table, rather than MBR (you can usually convert > from one to the other without reformatting, but that can require tricky > fiddling, so if you can reformat go for it), with an appropriate EFI > system partition mounted to /boot/efi. > - Install grub-efi-amd64 (or grub-efi-i386, of course), and > "grub-install /dev/sda" > - reboot > > You may need extra steps to convince your system to boot from Debian's > grub-efi, e.g. copying /boot/efi/efi/debian/grubx64.efi to > /boot/efi/efi/boot/bootx64.efi or selecting debian/grubx64.efi from your > BIOS's boot menu. > > IIRC last time I did it, I mostly followed the recipe in > https://tanguy.ortolo.eu/blog/article51/debian-efi > > > Stefan > >
