Can I install in UEFI mode with the alternate installer?
Solution 1:
I figured it out, so for those who are interested, here's how to do it:
After the installation, reboot the computer into a live CD or any Linux CD that can mount the hard drive partitions. Then, do the following: (replace #
with appropriate partition numbers)
### Mounting ###
sudo mount /dev/sda# /mnt #Mount root (/) partition
sudo mount /dev/sda# /mnt/boot #Mount boot (/boot) partition
(if separate from root partition)
sudo mkdir -p /mnt/boot/efi #Create EFI partition mount point
sudo mount /dev/sda1 /mnt/boot/efi #Mount EFI partition
sudo mount --bind /dev /mnt/dev
sudo mount --bind /proc /mnt/proc
sudo mount --bind /sys /mnt/sys
sudo chroot /mnt #Chroot to your installation
### Installing ###
apt-get install grub-efi-amd64 #Install grub EFI bootloader
grub-install --recheck --no-floppy --force
#Install grub bootloader in EFI partition
echo "configfile (hd0,gpt#)/boot/grub.cfg" > /boot/efi/ubuntu/grub.cfg
#Tell grub to load grub.cfg from /boot
update-grub #Create grub menu list
exit #Exit chroot
### Unmounting ###
sudo umount /mnt/dev
sudo umount /mnt/proc
sudo umount /mnt/sys
sudo umount /mnt/boot/efi
sudo umount /mnt/boot
sudo umount /mnt